Question

HELP1!!! PRECALC!! PLEASE~~!!!

Answer 1

divide across by 4,
bring cos(x) over so that sin(x) = 1- cos^2(x) / sin(x) = sin^2(x)
...divide across by sin(x) ...sin(x) = 0
x = 0, pi
I think :/

Answer 2

use sin^2 + cos^2 = 1 or cos^2 = 1 - sin^2

then 4 sin(x) + 4(1-sin^2(x) = 4

4sin(x) - 4sin^2(x) = 0

4sin(x)(1 - sin(x) = 0

sin(x) = 0 or 1

sin(x) = 0 x = 0, pi, 2pi

sin(x) = 1 x = pi/2