Question

f(x) = sin (x/2) - cos x
find the zeros using half angle formulas

Answer 1

\[
\sin(x/2)=\pm\sqrt{\frac{1-\cos x}{2}}
\]

Answer 2

how should I approach that after plugging that in?

Answer 3

Set it equal to \(\cos x\) and square both sides.

Answer 4

thanks, brain isnt working today