I am doing sum and difference formulas with sin, cos, and tan. I am doing tan75 with the difference formula. So tan 120-45 I have all the things found I just don't know...

I am doing sum and difference formulas with sin, cos, and tan. I am doing tan75 with the difference formula. So tan 120-45 I have all the things found I just don't know...

The question is cos -105. I know how to do the process for it but for some reason my answer doesn't have the right negatives. I am getting: √2 + (-√6) -------------- ...

Determine the exact value of cos(Pi/24)???

How do I rewrite (tanθ+secθ)/cosθ in terms of sinθ? (fully simplified)

solve the equation for the solutions over the interval [0 degrees, 360 degrees) 6sec2xtanx=12tanx I am unsure of where to begin.

This question is about to prove some trigonometric identities

Trigonometry Identities and equation

cos(3theta)=-1 solve for exact solutions over the interval [0,360 degrees] I am having trouble finding a place to start.

Please use special angles of the unit circle and any trigonometry identities if used.

Proving identities

prove that tan6.tan42.tan66.tan78=1

sinxcos^4x+cos^6x=

Find the exact value algebraically of sin(105°)

cos(2θ) = 1/√2 (1 divided by square root 2) 90° ≤ θ ≤ 180°

(sinx)/(cosx-sinx)=cotx+1, find x

Hi, this is my first time using this site. So I have been staring at this trigonometric equation for a long while and looking for what it asks for. For what I know, I think I have to use sum of...

tan34/2(1-tan34) =(2/2)[tan34/2(1-tan34) =2tan34/4(1-tan34) i need to have the form 2tanA/1-tan^2A but i cant eliminate the 4

Solve step by step to get the answer

tana+tanb/1-tanatanb im confused becase sqrt of 3 over 3 is the value of tan 30 so its hard to solve the arithmetic and the algebra. help please!

The question is- In a △PQR, if 3sinP+4cosQ = 6 and 4sinQ+3cosP=1, then the angle R is equal to: