Question

Help me out?

Answer 1

Hint: it uses one of the half arguments

Answer 2

\[\sqrt{\frac{ 1+\cos \theta }{ 2 }}\] This is an identity. See which identity it matches with and use \(\theta = 90.38\) and plug it in to the identity.

Answer 3

@Tedimariah would u tell me what is the value come of cos 90.38

Answer 4

please, use the identity:
\[2(\cos(x))^{2}=1+\cos(2x)\]

Answer 5

cos 90.38 degree = -0.0066
now put it in the expression which is given to u that is