Questions on Algebra: Trigonometry answered by real tutors!

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Question 149788: Find one angle with positive measure and one negative measure coterminal with -310 degrees
Click here to see answer by vleith(1977)

Question 149631: which of the following is likely to be found in most non-simple-polynomial rational functions?

Possible answers
1. Horizontal asymptote
2. vertical asymptote
3. roots
4. defined value at x=0
Click here to see answer by kmcruz09(38)

Question 149723: Find the area of triangle ABC if A=56 degrees, b=20 ft, and c=12 feet. Round to the nearest tenth.
Click here to see answer by Alan3354(6097)

Question 149726: In triangle ABC A=35 degrees, a=43 and c=20. Determine whether triangle ABC has no solution, one solution, or two solutions. Then solve the triangle. Round to the nearest tenth.
Click here to see answer by Edwin McCravy(2922)

Question 149648: p(-15/17,-8/17) is found on the unit circle. Find sin 0 ( a line through the middle of 0)and cos 0 ( a line through the middle of 0)
Click here to see answer by Alan3354(6097)

Question 149909: Please help me find the inverse of:
3 -1
-2 1
All in brackets! If it exists!
Thank you, Ray
Click here to see answer by vleith(1977)

Question 149644: Find one angle with positive measure and one angle with negative measure coterminal with -310^o (degrees)
Click here to see answer by mangopeeler07(450)

Question 149920: Could I please get some help with the following problem:
there is a diagram of a triangle
one side is = 1, another side is = 4 and there is 100 degree angle
I am looking for the value of side C
thank you,
RF
Click here to see answer by stanbon(26297)

Question 149918: Sketch one complete period of the graph of g(x)=sin(2piex). Label the x-intercepts and the local maximums and minimums.

Click here to see answer by Edwin McCravy(2922)

Question 149927: A culture of yeast doubles in size every 20 minutes. The size of the culture is now N0. Find its size in 12 hours.
Click here to see answer by stanbon(26297)

Question 149904: Please help me solve: sin3A=1, o<=A<2pi.
Thank you, Ray

Click here to see answer by Alan3354(6097)

Question 149907: PLease help me write v in the form ai + bj + ck and find ||V|| if the initial point p is (4,7,0) and the terminal point Q is (0,5,6).
Thank you, Ray
Click here to see answer by Alan3354(6097)

Question 149886: This problem is giving me some trouble, will somebody please help!
Find the value of the determinant:
2 3 10
0 1 5
-1 2 3
All inclosed in brackets!
Thank you, Natalie
Click here to see answer by Alan3354(6097)

Question 149987: Please help!
If side a = 10, side b = 7, and side c = 8, find angle A.
Thank you, Tami
Click here to see answer by stanbon(26297)

Question 149985: please help!
Find the value of:
tan^-1 (-sqrt. 3)
Thank you, Tami
Click here to see answer by scott8148(3385)

Question 149984: Please help!
If we establish an identity:
(tan A - cot A)/(tan A + cot A) would equal what?
Thank you, Tami
Click here to see answer by scott8148(3385)

Question 149977: A water wheel has a 10 foot radius. In order to estimate the speed of the river current you note that the wheel is turning at 14 revolutions per minute. How fast is the current in miles per hour?
Click here to see answer by ankor@dixie-net.com(6693)

Question 148350: WHAT IS THE EXACT VALUE OF THE FOLLOWING?
1) SIN 9PI/2
2) COSECANT 7PI
Click here to see answer by Alan3354(6097)

Question 149972: Find the values of the trigonometric functions of "theta" from the given information.
sin(theta)=3/5, t in quadrant II. (Hint: You will need one of the Pythagorean Identities).
Cos(theta)=?
Tan(theta)=?
Sec(theta)=?
Csc(theta)=?
Cot(theta)=?
Click here to see answer by Fombitz(2113)

Question 149978: From a point on the ground 500 feet from the base of a building, it is observed that the angle of elevation to the top of the building is 24 degrees and the angle of elevation to the top of a flagpole atop the building is 27 degrees. Find the height of the building and the length of the flagpole.
Click here to see answer by ankor@dixie-net.com(6693)

Question 150081: Please help me one more time!
Find the height of a building that is 80ft. away from a point on the ground, when this point on the ground makes an angle of 25 degrees with the top of the building.
Thank you, Ray!
Click here to see answer by vleith(1977)

Question 150077: Please help me find the solution to this problem!
If side a = 1, side b = 2, and angle C = 60 degrees, find side c.
Thank you for help, Ray!
Click here to see answer by vleith(1977)

Question 150080: Again will someone please help!
Find the area of a triangle if side a = 3, and sides b and c = 2.
Thanks again, Ray
Click here to see answer by Alan3354(6097)

Question 150173: Please help me solve this using matrices:
x + 2y - z = 2
2x - 2y + z = -1
6x +4y +3z = 5
Thank you so much, Lennie
Click here to see answer by Fombitz(2113)

Question 150175: Please help me with the following problem:
If we extablish an identity:
(cos^2 A)/(1 + sin A) would equal which of the following?
1. cos^2 A + cot A cos A
2. 1 + sin A
3. 1 - sin A
4. 1
Thank you, Lennie
Click here to see answer by jim_thompson5910(13794)

Question 150137: Will someone please help me! I do not understand how to get to the polar form!
Write the following as a complex number in polar form:
sqrt.3 + i
Thank you for your time, Natalie
Click here to see answer by scott8148(3385)

Question 150200: This problem is really frustrating me, I just don't understand, will someone please help?
Find teh area of a triangle if side b = 5, side c = 4, and angle A = 20 degrees.
Thank you so much for your time!
Lindsey
Click here to see answer by stanbon(26297)

Question 150255: I have been trying to work this problem for a while now and I just can't seem to get it, will someone PLEASE HELP me!
Write 3(cos 60 degrees + i sin 60 degrees) in the form (a + bi).
Thank you so much, Natalie!
Click here to see answer by Fombitz(2113)

Question 150253: Will someone please help me, I'm so confused!
If we extablish an identity, (in simplest terms) 4 sec^2 A - 7 tan^2 A would equal what?
1. (4 cos^2 A - 3 sin^2 A)/(cos^2 A)
2. 4 - 3 tan^2 A
3. 1
4. (7 - 3 cos^2 A)/(cos^2 A)
Thank you so much for your time and help, Natalie!
Click here to see answer by Fombitz(2113)

Question 150295: Please Help!
What would be the determinant of Dx, if Cramer's Rule is used to solve:
3x-2y=5
2x+5y=-3
Thank you for your time!
Click here to see answer by Alan3354(6097)

Question 150294: Please Help!
The product of:
2 1
-3 5
and
3 1 -1
2 4 -2
all in brackets, is what?
Thank you for your time!
Click here to see answer by Fombitz(2113)

Question 150269: This problem is really difficult, I just can't seem to figure it out. Will someone PLEASE HELP ME!
If:
z = 6(cos 205 degrees + i sin 205 degrees) and w = 3(cos 85 degrees + i sin 85 degrees), which of the following is (z/w) in polar form?
1. 2(cos 290 degrees + i sin 290 degrees)
2. 0.5(cos(-120 degrees) + i sin (-120 degrees))
3. 18(cos 290 degrees + i sin 290 degrees)
4. 2(cos 120 degrees + i sin 120 degrees)
Thanks again for all of your help, I really appreciate it!
Natalie
Click here to see answer by Edwin McCravy(2922)

Question 150314: Please help me with this!
If:
z=4(cos 50 degrees + i sin 50 degrees) and w=2(cos 340 degrees + i sin 340 degrees), find z/w in polar form.
The choices that are given are:
1. 8(cos 390 degrees + i sin 390 degrees)
2. 2[cos (-290 degrees) + i sin (-290 degrees)]
3. 2(cos 290 degrees + i sin 290 degrees)
4. 2(cos 110 degrees + i sin 110 degrees)
Thanks, Tami
Click here to see answer by Edwin McCravy(2922)

Question 150317: Please help me answer the following:
(-5,12) are the coordinates of a point in rectangular form. Find this point in polar form (r,A), with A expressed in radians.
The answer choices include:
1. (13,112.6)
2. (13,1.97)
3. (10.9,1.97)
4. (10.9,112.6)
Thanks, Tami
Click here to see answer by Edwin McCravy(2922)

Question 150298: Please help me solve the following:
Which of the following describes the sequence:
5, (-5/3), (5/9), (-5/27), (5/81), ...
The answer choices are:
1. Geometric, r=(-1/3)
2. Arithmetic, d=(-1/3)
3. Geometric, r=(1/3)
4. Arithmetic, d=(-5/6)
Thank you, Ray
Click here to see answer by Edwin McCravy(2922)

Question 150169: Would someone please help me with this problem?
Find the exact value of:
sin^-1 (-1/2)
Thank you, Ray
Click here to see answer by jojo14344(1483)

Question 150312: Please help me write (3-2i) in polar form.
Here are the choices:
1. sqrt13(cos 33.7 degrees + i sin 33.7 degrees)
2. sqrt5(cos 326.3 degrees + i sin 326.3 degrees)
3. sqrt5(cos 33.7 degrees + i sin 33.7 degrees)
4. sqrt13(cos 326.3 degrees + i sin 326.3 degrees)
Thanks, Tami
Click here to see answer by Fombitz(2113)

Question 150316: Please help me find the area of a triangle if:
a=2, b=1, and C=100 degrees.
The choices are as follows:
1. 0.98
2. 1.97
3. 0.17
4. 1.53
Thanks, Tami
Click here to see answer by josmiceli(3013)

Question 150497: 1986 explosion at the Chernobyl nuclear power plant in the former soviet union sent about 1000 kilograms of radioactive cesium-137 into the atmosphere. The function f(x)=1000(0.5)^x/30 describes the amount, f(x) in kilograms, of cesium-137 remaining in Chernobyl x yrs after 1986. If even 100 kilograms of cesium-137 remain in Chernobyl's atmosphere, the area is considered unsafe for humans. find f(80) and determine if Chernobyl will be safe to live in 2066.
Click here to see answer by josmiceli(3013)

Question 150361: Please help me find the focus and the dirctrix of the parabola 16x^2=y.
There are 4 choices for an answer:
1. Focus (0,4), directrix y=-4
2. Focus (0,1/4), directrix y=-1/4
3. Focus (0,1/16), directrix y=-1/16
4. Focus (0,1/64), directrix y=-1/64
Thank you for your time and help, Natalie!
Click here to see answer by Alan3354(6097)

Question 150529: if two rows of a determinant are interchanged, what is true of the resulting determinant?
Click here to see answer by Edwin McCravy(2922)

Question 150600: Natural base (e) question.
e^-0.75
Click here to see answer by checkley77(7072)

Question 150753: whats is tan 11pi/6?
Click here to see answer by josmiceli(3013)

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