Question

Solve 2 cos^2 (x/2) + sin 2x = 1 at interval (0, 2pi)

Answer 1

Remember that \[1=\sin^2(x) + \cos^2(x)\]

Answer 2

Also keep in mind all the other trig identities.

Answer 3

and don't forget to use algebra, if necessary.

Answer 4

try now