Question

Precalc | trig questions, because I'm a dum-dum (too tired to think) right now.
No answering machines.

find exact value of cos 345°

find all solutions for x in the interval [0, 2pi): \[\sin{\left(x+\frac{\pi}{2}\right)}-sin{\left(x-\frac{\pi}{2}\right)}=\sqrt{3}\]
\[\text{verify }\frac{\cos{4x}+\cos{2x}}{\sin{4x}+\sin{2x}}\]

Answer 1

ahh i dont like degrees

Answer 2

radian addict. lol