Questions on Algebra: Trigonometry answered by real tutors!

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Question 294492: Which of the following is the best approximation for the measure of angle A if you are given sin A = .312?
a. 17.32°
b. 18.18°
c. 71.82°
d. 21.34°
Which of the following is the best approximation for the measure of angle B if you are given tan B =
a. 36.87°
b. 53.13°
c. 45.78°
d. 38.66°

Click here to see answer by Edwin McCravy(8909)

Question 295007: amp 15, period pie/6 point (1,0)
find amplitude period phase shift and vertical translation
Click here to see answer by Alan3354(30993)

Question 295038: Find the real solutions of teh system of equations:
x^2 + y^2 = 4
2x + y = 0
Thanks!
Click here to see answer by richwmiller(9135)

Question 295301: Please help me prove this Trig identity:

Click here to see answer by Edwin McCravy(8909)

Question 295301: Please help me prove this Trig identity:

Click here to see answer by CharlesG2(828)

Question 295300: Please help me prove this Trig identity:

Click here to see answer by Fombitz(13828)

Question 295431: The height of a triangle is three feet longer than the base. The area of the triangle is 35 square feet. What is the height and base of the triangle?
Click here to see answer by checkley77(12569)

Question 295529: Convert this equation to a polar equation.
y = 4x2 + 3x

Click here to see answer by Fombitz(13828)

Question 295515: If x-8, what is the value of 4^0-3x^1/3 ?
Click here to see answer by Fombitz(13828)

Question 295721: f(x) = -3x + 7
How do I find the inverse of this function?
thank you!
Click here to see answer by jim_thompson5910(28595)

Question 295736: A tower is 200 ft tall. To the nearest degree, find the angle of elevation from a point 50ft away from the base of the tower to the top of the tower.
Click here to see answer by Fombitz(13828)

Question 295552: Find the amplitude, period and phase shift of y= 3cos(2x+pi)
Click here to see answer by Fombitz(13828)

Question 295678: Two planes leave an airport at the same time, one flying due west at 500km/h and the other flying due southeast at 300km/h. What is the distance between the planes two hours later?
Click here to see answer by Alan3354(30993)

Question 295913: if theta=-pi divided by 3, what is the value of y?
Click here to see answer by Alan3354(30993)

Question 296140: prove A)cot^2x= cos^2x cot^2x

Click here to see answer by Alan3354(30993)

Question 296467: how do you solve cos2(x)-sin^2(x)+ sin(x) + 1 = 0 ?
Click here to see answer by stanbon(57347)

Question 296534: Find both real numbers x between 0 and 2pi radians, where tan(x) = -2.5?
Click here to see answer by Alan3354(30993)

Question 296613: find the exact value of tan 17pi/12
Click here to see answer by stanbon(57347)

Question 296670: factor each quadratic expression?
2xsquared-3x-27
Click here to see answer by checkley77(12569)

Question 296672: If the sine of an angle is negative, which other trigonometric functions will definitely have negative values?
Click here to see answer by jim_thompson5910(28595)

Question 296708: Perform the following operation for the given equation:
-3v for v= -2i - j
Click here to see answer by jim_thompson5910(28595)

Question 296866: verify
Click here to see answer by Edwin McCravy(8909)

Question 297085: The line drawn tangent to the circle x squared + y squared=169 at (12,5) meets the y-axis where?
Click here to see answer by Theo(3464)

Question 297153: can you show the steps to verify sec(x)/(cot(x)+tan(x))=sin(x)
Click here to see answer by Fombitz(13828)

Question 297270: what formula of gradians in coordinates polar and why?
Click here to see answer by Alan3354(30993)

Question 297424: find the slope of the line with inclination 2pi/3
Click here to see answer by checkley77(12569)

Question 297423: Starting with the graph of f(x)=6^x , write the equation of the graph that results from
shifting 7 units upward.
shifting 7 units to the left
shifting right 8 units, then reflecting about the y-axis.
Click here to see answer by Edwin McCravy(8909)

Question 297915: Find the exact value of the trigonometric function given that sin(u) = 12/13 and cos(v) = -4/5. (Both u and v are in Quadrant II.)
cos(v − u)
Click here to see answer by Fombitz(13828)

Question 298029: Find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas.
cot(u) = -5, 3π
2 < u < 2π

Click here to see answer by nyc_function(2733)

Question 298017: What are two values for cos theta = 1/2
Click here to see answer by chibisan(131)

Question 294541: prove the identity sec^2(x)=1/(1-sin^2(x))
Click here to see answer by chibisan(131)

Question 298392: Find, to the nearest minute, the angle whose measure is 3.45 radians.
Click here to see answer by Fombitz(13828)

Question 298471: please help me answer my question
find all solutions of the equation 4cos^2x-4cosx+1=0
Click here to see answer by Greenfinch(383)

Question 298598: how to solve: tan^2x - square root 3tanx
Click here to see answer by stanbon(57347)

Question 299097: cos (sin x) = 1
the answer is npi, n=o, plus or minus 1. plus or minus 2, etc...
Click here to see answer by stanbon(57347)

Question 299098: sin x = 0.30
find all solutions.
the answer is 0.11918 + 2npi, n=o, plus/minus 1, plus/minus 2, etc...
thank you!
Click here to see answer by Alan3354(30993)

Question 299132: What is the square root of x^2y^3?
So far i have gotten (x^2y^3)1/1=x^2/1y^3/1...am i going in the right direction?...and if so what do i do next?
Click here to see answer by Alan3354(30993)

Question 299279: I am standing at the trailhead of a mountain trail on level ground. I know from my map that the horizontal distance from this spot to the top of the mountain is 3 miles. I find that the angle of elevation to the top of the mountain from this point is 4 degrees. What is the height of the mountain, in feet?
Click here to see answer by Earlsdon(6287)

Question 299423: two angle of a triangle are 40* and 15* and the longest side is 52ft. Find the length of the shortest side. How do I find the length of the shortest side?
Click here to see answer by jim_thompson5910(28595)

Question 299501: Round the decimal to the nearest tenths place 6.730
Click here to see answer by missgigid(8)

Question 299745: Given Θ = 30 degrees, and b = 2, c = ?
A. 8
B. 6.5
C. 4.8
D. 6.9
E. 4

How do I go about solving this question?
Click here to see answer by Alan3354(30993)

Question 299753: vertical distance between a wave's high point and low point is 1.8 and they cycle is repeated every 4 seconds. determine a sinusoidal equation
use your model to determine when the boat is 0.5 abovie its mean position
Click here to see answer by Alan3354(30993)

Question 299714: what is true about functions and their inverses
Click here to see answer by checkley77(12569)

Question 299967: a utility pole is 30 ft high is erected at one end of a level driveway 96 ft long. What is the angle of depression from the top of the pole to the other end of the driveway? Give the angle to the nearest tenth of a degree.
Click here to see answer by Alan3354(30993)

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