Question

I could use help with these two problems below. They're both solving for θ.

Answer 1

$\sin( \frac{theta}{2} ) = \frac{1}{2} \\ \frac{ \sin(theta) }{2} = \frac{1}{2} \\ \sin(theta) = \frac{2}{2} = 1 \\ \sin(theta) = 1 \\ theta = 90$