Question

use the half angle formula to find the exact value of 165

Answer 1

165 is equal to 165
No half angle formula needed.

Answer 2

I think your question is missing something honestly...

Answer 3

how do I find the exact values of sin, cos and tang?

Answer 4

sin(165)=\[\sin(\frac{330}{2})=\sqrt{\frac{1}{2}(1-\cos(330))}\] Now you simplify.

Answer 5

\[\sin(\frac{x}{2})=\pm \sqrt{\frac{1}{2}(1-\cos(x))} \text{ and } \cos(\frac{x}{2})=\pm \sqrt{\frac{1}{2}(1+\cos(x))}\]
since the angle is 165 we are in between 90 and 180
which means sin is positive and cos is negative

Answer 6

Thank you so much