Question

Find the exact value of the following trigonometric functions:

sin(13pi), cos(14pi), tan(15pi)
follow the steps that I showed you in previous post

Related Questions

determine an exact expression for the trigonometric function sin(13pi/12). find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-pi/5) use a sum or difference formula to find the exact of the trigonometric function cos(-13pi/12) If cos(a)=1/2 and sin(b)=2/3, find sin(a+b), if 1) Both angles are acute; Answer: (sqrt(15)+2)/6...