Trigonometric
posted by Michael .
Find the exact value of cos7(pi)/12 using sum and/or difference identities.
Respond to this Question
Similar Questions

Trigonometry
I don't understand how I'm supposed set the problem up or what theta is... Use the given function value(s), and trigonometric identities (including the cofunction identities), to find the indicated trigonometric functions. sec theta … 
trig
use sum or difference identities to find the exact value of the trigonometric function: tan 345 please show work, i cant figure out what im doing wrong! 
Trig
How do you express sin4x as a trigonometric funcition of x using the identities? 
trig
using the trigonometric identities find the exact (radical form) value of cos (105 degrees) 
Math
Use the sum or difference identities to find the exact value of each trigonometric function. sec pi/12 Thanks :) 
Calculus
find the exact value of sin 11pi/12 using the sum or difference formula. 
TRIG/ALGEBRA
1) Find the exact value. Use a sum or difference identity. tan (15 degrees) 2) Rewrite the following expression as a trigonometric function of a single angle measure. cos 3x cos 4x  sin 3x sine 4x 
precalculus
use a sum or difference formula to find the exact of the trigonometric function cos(13pi/12) 
Math Trig
1. Determine the exact value of cos^1 (pi/2). Give number and explanaton. 2. Determine the exact value of tan^1(sq. root 3). with explanation. 3. Determine exact value of cos(cos^1(19 pi)). with explanation. 4. Determine the exact … 
Math
If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)