Questions on Algebra: Trigonometry answered by real tutors!

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Question 405665: A pendulum in a grandfather clock is 4 feet long and swings back and forth along a 6-inch arc. Approximate the angle in degrees through which the pendulum passes during one swing.
Click here to see answer by lwsshak3(6522)

Question 405969: (sin2x/ 1+cos2x) * (cosx/1－cosx) HOW TO WORK OUT TI THANK YOU VERY MUCH
Click here to see answer by Tatiana_Stebko(1326)

Question 406170: •Explain how you could change 15.6% to a decimal (round to the nearest tenth) and a fraction (reduced to its lowest terms).

Click here to see answer by rfer(12670)

Question 406254: I really need help!!!!!

A theater has 30 seats in the first row, 32 seats in the second row, increasing by 2 seat per row for a total of 26 rows .How many seats are there in the theater.
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Question 406251: I really need help!!!!!

In 1987 17.6% of high school grades for college freshman consisted of A's (A+, A, or A-). On average, this has increased by approximately 0.83% per year.
Write a formula for the nth term of the arthmetric sequence that models the percentage of high school grades of A for college freshman n years after 1967.
B.trends shows by the model in part (a) continue, what percentage of high school grades for college freshman will consist in 2018?
Click here to see answer by ewatrrr(10682)

Question 406338: if sin data = 0, find all the possible values of A) cos data B) tan data C) sec data
Click here to see answer by stanbon(57387)

Question 405670: A motorist, traveling along a level highway at a speed of 60 km/h directly toward a mountain, observes that between 1:00 PM and 1:10 PM, the angle of elevation to the top of the mountain changes from 10 degrees to 70 degrees. Approximate the height of the mountain.
Click here to see answer by lwsshak3(6522)

Question 406414: What are the points at x=-4, x=0, and x=4 on the graph y=4sin(2x+(π/4))?
Click here to see answer by lwsshak3(6522)

Question 403610: use long division to solve (2x-5)/(x^3-5x^2+5x+4)
I know how to do the long division method but the leading 2 in 2x-5 is throwing me off.
Click here to see answer by lwsshak3(6522)

Question 406879: A parabolic arch has a span of 100 feet and a maximum height of 25 feet. Write an equation to represent the arch, then calculate the height of the arch 20 feet from the center
Click here to see answer by ewatrrr(10682)

Question 407665: derive the equation for the average rate of change for the function tan x.
Click here to see answer by richard1234(5390)

Question 407063: The equation of the hyperbola is x^2-6x-9y^2=0
show the equation in standard form
find the coordinates for the vertices and the foci and give the equations of the asymptotes
Click here to see answer by lwsshak3(6522)

Question 407306: f(x)=2squareroot(x-1)+3 graph and state the domain and range
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Question 408127: How can one divide fractions? For the cot pi/3 = 60 degrees, it's x divided by y, which would be 1/2 divided by square root of 3/2. I don't understand how the answer comes out to be square root of 3 over 3...? Is it something I just have to memorize or can it be worked out? Sorry if this is a really obvious algebra question math just isn't my strongest subject! Thanks.
Click here to see answer by josmiceli(9697)

Question 408166: Simplify the following problem.
(sec^2x + csc^2x)-(tan^2x + cot^2x)
Click here to see answer by ewatrrr(10682)

Question 408166: Simplify the following problem.
(sec^2x + csc^2x)-(tan^2x + cot^2x)
Click here to see answer by MathLover1(6638)

Question 408205: How do I figure out the exact value of 11pi/2? I need to know this and other questions like this for my homework and cannot figure it out since I don't see it on the unit circle. Another is tan(6pi). Can you please explain to me how to get the correct answer to these kinds of questions, the more detail the better! Thanks!
Click here to see answer by josmiceli(9697)

Question 408082: a weather balloon ascends at a rate of 3.86 km/h while moving at an angle of 71.8 degrees with the ground. at the end of an hour what is the horizontal travel (x) of the balloon?
Click here to see answer by ankor@dixie-net.com(15660)

Question 408456: how do you verify ((secx- cscx)/(secxcscx)) = sinx- cosx
Click here to see answer by MathLover1(6638)

Question 408715: sin(a+b)-sin(a-b)=2cosasinb
How do I solve this problem? I am so close to a break down over this. Help!!

Click here to see answer by robertb(4012)

Question 408715: sin(a+b)-sin(a-b)=2cosasinb
How do I solve this problem? I am so close to a break down over this. Help!!

Click here to see answer by jim_thompson5910(28598)

Question 408715: sin(a+b)-sin(a-b)=2cosasinb
How do I solve this problem? I am so close to a break down over this. Help!!

Click here to see answer by richard1234(5390)

Question 408869: Please Help!!!!!!!!

Fifty people purchase raffle tickets. Three winners are selected random. If the first prize is $1,000, the second prize is $500, and the third is $100, in how many ways can the prizes be awarded?

Click here to see answer by stanbon(57387)

Question 409022: Sin(17)=6.6/X I know the answer but not how to get to it. Can you Explain how to find the answer?
Click here to see answer by richard1234(5390)

Question 409503: What is the reference angle of 13pi/8? How do I get the correct answer? Please help me, thank you!
Click here to see answer by stanbon(57387)

Question 409578: I need to establish the identity, and show and prove how:
(1+sin theta)/(1-sin theta)-(1-sin theta)/(1+sin theta)= 4 tan theta sec theta
I need the step by step breakdown of how we got the answer on the left side to equal the answer on the right side.
Thank you,
Chris B.
Click here to see answer by lwsshak3(6522)

Question 409491: How do I find reference angles? How do I know which quadrant certain angles are in such as 11pi/3 and 7pi/8? Do I convert them to degrees to figure out the exact spot on the circle before finding the reference angle? How do I figure out the reference angle? Thanks so much!
Click here to see answer by stanbon(57387)

Question 409609: please help. True or false: there is at least one value of x for which inverse sin(2.35)=x. thanks
Click here to see answer by stanbon(57387)

Question 409043: i need to see a sketch graph of y=tan(x-pi) the asymtotes are whats confussing me? thank you for your help if you can send a picture of the sketch graph that would be wonderful
Click here to see answer by stanbon(57387)

Question 409268: Find all values of θ in radians with -2pi<θ<2pi such that tan(θ) = 0

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Question 409861: how do you find theta to the nearest second in a function question?
example:
tan(theta symbol)= .7465
Click here to see answer by richard1234(5390)

Question 409907: dividing polynomies
Hi!
I got my HW and i don't know how to do it and y need help
my problems are..
81x3-192=0
125x3+216=0
x4-64=0
-2x4+46x2=-100
27=-x4-12x2
x5-5x3+4x=0
Click here to see answer by lwsshak3(6522)

Question 409940: Hi, please help me with this problem:
What is the exact value of cos(arccos (-1/2))
Thanks!!
Click here to see answer by richard1234(5390)

Question 409939: Hi, please help me with this problem:
What is the exact value of cos (sin inverse Sqrt(2) / 2) ?
Thanks!
Click here to see answer by lwsshak3(6522)

Question 410300: graph P=100-20cos(8π/3t)
State the period and amplitude
Click here to see answer by stanbon(57387)

Question 410297: graph P=100-20cos(8π/3t)
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Question 410223: Solve each equation for theta if theta is greater than or equal to 0 degrees and less than 360 degrees.
1. sec theta - 2tan theta= 0
Click here to see answer by stanbon(57387)

Question 410549: what is the value of "sin to the -1 power times .707"?

-1
sin .707=
Click here to see answer by Theo(3464)

Question 410703: Please help me solve this equation
3sin^2 x= cos^2 x
Click here to see answer by stanbon(57387)

Question 410719: Please help me verify this equation:
(sec x +tan x) (1-sin x) = cos x
Click here to see answer by lwsshak3(6522)

Question 410717: Please help me verify this equation:
cot^2 theta-cos^2 theta= (cot^2 theta) (cos^2 theta)
Click here to see answer by lwsshak3(6522)

Question 410704: Please help me solve this equation
sin^2 x-3cosx=3
Click here to see answer by lwsshak3(6522)

Question 410613: how to verify the identity of problem
cos^4(x)-sin^4(x)=2cos^2(x)-1
Click here to see answer by lwsshak3(6522)

Question 410701: Please help me solve this equation
2csc^2 x=3cot^2 x-1
Click here to see answer by lwsshak3(6522)

Question 410944: solve :(sin B)(sinB)-3sin B+2=0 where 0 < B < 2pie .
Click here to see answer by richard1234(5390)

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