trigonometric identities

prove that cos(90°-θ)/tan(180°+θ)=cos(360°-θ)

Proof of trigonometric identity

(1-cos^2x)/tan^2x=cos^2x

Aug 3 | Grape from Beverly Hills, CA | 1 Answer | 0 Votes

fiind all solutions at interval [0,2pi] sin^2x - cos^2x = 0

 find all the solutions at the interval [0,2pi] for the equation sin^2 x - cos^2 x = 0

(sin x + sin 3x + sin 5x )/ (cos x + cos 3x + cos 5x) = tan 3x

how do you prove this identity (using a level maths)

Suppose the θ is an acute angle and cosθ = 4/5. Using the results sin2x = 1/2*(1 - cos2x) and cos2x = 1/2*(1 + cos2x), find the exact values of cos1/2θ, sin1

Suppose the θ is an acute angle and cosθ = 4/5.    Using the results sin2x = 1/2*(1 - cos2x) and cos2x = 1/2*(1 + cos2x),   find the exact values of cos1/2θ,...

The trigonometric ratio of 13pi/3 are same as that of?

pi/3, pi, pi/6 or 11pi/3??  

Jun 27 | Zainab from New York, NY | 1 Answer | 0 Votes

Points of discountuity

how do we find pointa of discountity of trignometric functions such as tan^-1(5x)   or sec(5x)

Jun 7 | Sara from New York, NY | 1 Answer | 0 Votes

How to simplify trigonometric equations? (See details below)

Here is the question I'm stuck on:    The motion of point P is given by the following equations:   x(t) = -2 sin (t) cos (t)  y(t) = cos (2t)  The...

Verify the identity. sin quantity x plus pi divided by two = cos x

Precalculus

Verify the identity. cotangent of x to the second power divided by quantity cosecant of x plus one equals quantity one minus sine of x divided by sine of x

Precalculus

Verify the identity. 4 csc 2x = 2 csc2x tan x

 Precalculus  

Cos theta = -4/9 with theta in quadrant 2, find sin theta

I don’t know the answer .

solve and put in a trig equation

25 cos(2t)+12 sin(t+π/2)+2 cos^2(t)

verify the identity cot(x-pi/2)=-tanx

 precalculus

How to simplify trigonometric equations? (see details of question!)

This is the questions I'm stuck on:    Solve algebraically: f(x) = g(x) when f(x) = 4sin(2x)cos(2x)+2 and g(x)= 4sin(3x)sin(2x) + 2   1. I equated the equations  ...

May 14 | Isabella from Waynesburg, KY | 1 Answer | 0 Votes

If y=sin 0, what is sec 0 in terms of y?

Math question 

Very the identity

cos(x-y) / sin(x)sin(y) = cot(x)cot(y)+1

May 1 | Yodame from Los Angeles, CA | 1 Answer | 0 Votes

How to find coordinates on terminal arm

The angle theta is in the first quadrant and sin of theta = 2/sqrt(13) determine the possible coordinates for point P on the terminal arm

if sin of A = 5/13, in quad 1, find tan A/2 and a few others

if sin of A = 5/13, in quad 1, find tan A/2   if cos of A = -4/5, in quad 2, find sin A/2   if cos A =-4/5 in quad 2, find cos A/2   if cos A - -4/5 in quad...

Solve the equation 8sin(1/2)x - 5 = 0 for 0 < x < 2pi. Round your answers to the nearest hundredth of a radian.

Solve the equation 8sin(1/2)x - 5 = 0 for 0 < x < 2pi. Round your answers to the nearest hundredth of a radian.