## anonymous one year ago Will Medal! cos(a/2) = +/- sqrt (1+cos(a)/2) for all values of a. A. True B. False

1. anonymous

$\cos(\frac{ a }{ 2}) = \pm \sqrt{\frac{ 1+cosa }{ 2 }}$

2. anonymous

I think the answer might be true.

3. anonymous

Yeah it is true.