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Question 173031This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: 3) the expression
sin^2 x + cos^2 x / cos x
is equivalent to
1) sin x 2) cos x 3) sec x 4) csc x
4) if the probability that an event will occus is x/y , what is the probability that it will not occur?
1) y/x 2) -x/y 3) y - x / y 4) 1 - x / y
Please show work, thank you!
This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by Alan3354(6153)

Question 173021: show that p(-5/7,-2sqrt(6)/7) is on the unit circle
Click here to see answer by Alan3354(6153)

Question 173028: find the exact value of the expression sin(pie/6)cos(pie/3)+sin(pie/3)cos(pie/6)
Click here to see answer by jim_thompson5910(13811)

Question 173043: I cant solve these problem's would like some help.
1.If cos 0= -4/5,find sec 0.
2.Find the value of sin 0 for angle 0 in standard position of the point (-2,-4)that lies on the terminal side.
3.Suppose 0 is an angle in standard position whose terminal side lies in quadrant 2 and the tan 0=-1.Find the remaining trigonometric functions for the function 0.
4.Use the right triangle ABC to find side a if A=37 and b=9''.
Click here to see answer by Alan3354(6153)

Question 173025: find the exact value sin 3pie/4
Click here to see answer by user_dude2008(716)

Question 173129This question is from textbook Amsco's Perparing for the Regents Examination Mathematics B
: 6. The test scores in MRs. Kaste's MAth B class are normally distributed with a mean of 85 and a standard deviation of 5. Between what two scores would 95.4 percent of the scores fall?
1) 70-100 2) 75-95 3) 80-90 4) 85-90
7. The heights of the tides at Jones Beach, NY, are a function of the time of day. THe time from one high tide to another is approximately 12 hours. Which of the following types of functions would best model this situation?
1) exponential 2) linear 3) logarithmic 4) trigonometric

Show work, thanks alot !!!!This question is from textbook Amsco's Perparing for the Regents Examination Mathematics B

Click here to see answer by stanbon(26367)

Question 173132This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: 8. solve for x: (3 + 2i) + (4 + xi) = 7 - 5i
9. Which of the following is not sufficient to prove that a quadrilateral is a parallelogram?
(1) opposite sides are congruent (2) opposite angles are congruent
(3) diagonals are congruent (4) consecutive angles are supplementary

Show work please, thank you!This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by stanbon(26367)

Question 173152: These kind of problems are really confusing to me...
simplify
5cis115degrees * 4cis10degrees
I'm not even sure where to start.
thank you much!
Click here to see answer by jim_thompson5910(13811)

Question 173151: How do I do find answers to this problem?
y=-3cos(2x+pie)
find the
a.)amplitude
b.)period
c.)phase shift
d.)graph the function
Thank you much!
Click here to see answer by midwood_trail(310)

Question 173024: find the reference number for t=11pie/6
Click here to see answer by midwood_trail(310)

Question 173169This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: (14) Maxine left her home for school, walking at a steady pace. She stopped at a snack shop for some hot chocolate, and then continued on to schoolm walking at a steady pace but a little faster to make up for the time she spent at the snack shop. Sketch a graph of Maxine's distance from home as a function of time.

Show work thanks.! GOOD MORNING !!This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by stanbon(26367)

Question 173168This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: (12) Solve for x: sin x = cos (2x + 15)
(13) Write an equation that has a root of 3 + i
Good morning !! Show work, thanks.This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by stanbon(26367)

Question 173167: Please help me on my homework. I really need your help.
35. From a plane 2,000 m above sea level, the pilot observes two ships in line due west. The angles of depression of the two ships are 60 degrees and 70 degrees. How far apart are the ships?
36. A television antenna is situated atop a hill. From a point 200 m from the base of the cliff, the angle of elevation of the top of the antenna is 80 degrees. The angle of elevation of the bottom of the antenna from the same point is 75 degrees. How tall is the antenna?
37. A 40-cm long pendulum is moved 45 degrees from the vertical. How far did the tip of the pendulum rise?
38. Nuel travels due north from his house for 100 km, then 70 km due west, and then 60 km due north, then he stops. How far is he from from the house?
39. From the 3rd floor of a school building, one can see the top of a house at an angle of elevation of 40 degrees. If the place of observation is 20 m above the ground and 50 m from the house, how high is the house?
40. How long is the midline of an isosceles right triangle when its legs are 20-cm long?
Click here to see answer by Alan3354(6153)

Question 173275This question is from textbook Algebra and trigonometry

: (27^4)^-1/12This question is from textbook Algebra and trigonometry

Click here to see answer by jim_thompson5910(13811)

Question 173431: A highway that has a 6% grade rises 6ft. vertically for every 100ft. horizontally. What trigonometric ratio is being used in reporting the 6% grade? Explain why.
Click here to see answer by Alan3354(6153)

Question 173390: Please help me verify this equation:
cscx - cscx
------ ------ =2sec^2x
1+cscx 1-cscx

yes, the cscx's are over 1+cscx and 1-cscx. Those are fractions.
So far i have gotten stuck on this porblem. i have expanded csc x into 1/sinx in both parts of the left side of the equation which gets me:
1/sinx - 1/sinx
-------- --------- = 2sec^2x
1+1/sinx 1-1/sinx

After that i tried to achieve a common denominator on the left side which is where i get lost. I'm not sure what step to do after that or how to solve it.

Click here to see answer by gonzo(654)

Question 173459: I do not understand these at all could use help.
Solving Triangle's
1.K=40and k=26.FindL,j and l.
2.j=65 and l=55. Find K,L and k.
3.Solve Triangle ABC.Round to the nearest tenth if necessary.A=30,B=45,and a=10
Click here to see answer by Alan3354(6153)

Question 172275: I have two questions. One of them I came up with an answer, but am not sure if it is right.
1. Find the esact value of: tan(-3pi)
2. Find the exact value of: sin60 degrees - cos60 degrees.
For this I came up with an answer of 0.366
I have to show all my work.
Thanks

Click here to see answer by Alan3354(6153)

Question 173457: Really need help on these.
Find all the solution's for each triangle.Round to the nearest 10th.
1.a=125,A=25,b=150
2.a=32,c=20,A=112
Click here to see answer by stanbon(26367)

Question 173526: which of the following is equivalent to 1-cos^2 0/cos^2 0
Click here to see answer by jim_thompson5910(13811)

Question 173537This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: 16) Lucy and Ricky are pushing on a desk forming a 55degree angle with each other. If Lucy exerts a 110 pound force on the desk while Ricky exerts a 160 pound force, what is the magnitude of the resultant force, to the nearest tenth of a pound?
My answer I got 192.1 degree
If my answer is wrong can you please, show work and tell me the right answer!
Thank you so much for your time, I appreciate it alot. This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by Alan3354(6153)

Question 173539This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: 18) The We Make Widgets Company manufactures widgets. They find that when they charge d dollars for each widget, their income, I(d) can be expressed by the formular I(d) = -120d^2 + 14,400d + 100. What price should they charge to maximize their income? If this price is charged, what is their maxium income?
Please can someone help me and show work, step by step?
Thank you so much for your time.
Happy HolidaysThis question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Click here to see answer by nerdybill(2453)

Question 173675This question is from textbook Trigonometry
: Verify that the equation is an identity.
tan^2S*sin^2S = tan^2S+ cos^2S - 1This question is from textbook Trigonometry

Click here to see answer by SAT Math Tutor(36)

Question 173815: f(o)=2sin(o)-sin(o/2),then find f(3.14.../3)
Click here to see answer by stanbon(26367)

Question 173816: solve the following system of equations by the addition method,
2x-7y=2
3x+y=-20
Click here to see answer by stanbon(26367)

Question 173878: In which quadrant does terminal side of a 347 degree angle lie

Click here to see answer by nycsub_teacher(90)

Question 173909: Hi, I am trying to solve for "y" in this equation but I don't know where to start.
x = (y^3/512) + (3y^2/64) + (3y/8) + (1)

Click here to see answer by Edwin McCravy(2938)

Question 173949: Simplify:

Click here to see answer by stanbon(26367)

Question 173925:

Prove the identity



Click here to see answer by Edwin McCravy(2938)

Question 174070: 1)what is the exact value of cos 150
2)for a right tranigle ABC with A=40 degree, C=90 degree, b=15(not a degree). find a,c,B
Click here to see answer by stanbon(26367)

Question 174276: I need help verifying this identity.
cot^2x-cos^2x = (cot^2x)(cos^2x)
So I tried:
(cos^2x)/(sin^2x) -cos^2 = (cos^2x)/(sin^2x)(cos^2x)
But after that I'm kind of stumped. Any help with future steps would be appreciated!
Thanks so much!

Click here to see answer by stanbon(26367)

Question 173928: prove the following identities:
csc= 1/sin
sec= 1/cosx
cot= 1/tan
Click here to see answer by nycsub_teacher(90)

Question 174391: Pleease help me on this question,
Find the exact values of the six trigonometric function of θ if the terminal side of θ in standard position contains the point (-5,-4).
Click here to see answer by stanbon(26367)

Question 174396: Find the amplitude is it exists, and the period of y= cos3θ
Click here to see answer by stanbon(26367)

Question 174397: Find the amplitude if it exists, and the period of: y=tan 1/4 θ
Click here to see answer by stanbon(26367)

Question 174395: Find secθ if sinθ =-4/5 and 270 degrees< θ<360 degrees
Click here to see answer by stanbon(26367)

Question 174394: State the vertical shift and the equation of the midline for y= 4cosθ-1
Click here to see answer by stanbon(26367)

Question 174393: Simplify (1/secθ + sin squared θ/cosθ) cosθ
Click here to see answer by solver91311(5106)

Question 174392: Verify that secθ/sinθ (times) cotθ/cscθ is an identity
Click here to see answer by solver91311(5106)

Question 174405: Graph the function: y=4sin2θ
Click here to see answer by solver91311(5106)

Question 174406: State the phase shift of y= cos(θ-pie/3) Then graph the function
Click here to see answer by stanbon(26367)

Question 174407: Find the amplitude, if it exists, and the period of: y=cos3θ
Click here to see answer by stanbon(26367)

Question 174443: 44. verify the identiy
cos(x+y)+cos(x-y)=2cosxcosy
Click here to see answer by jim_thompson5910(13811)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835