Question

$2 \cos^{2} ( \frac{ \gamma }{2}) - \cos( \gamma )$

Answer 1

Упростить:

$2cos^2 \frac{\gamma }{2}-cos\gamma =1+cos\gamma -cos\gamma=1\\\\Formyla:\; \; cos^2 \frac{ \alpha }{2}= \frac{1+cos \alpha }{2}\; \; \Rightarrow \; \; 2cos^2 \frac{ \alpha }{2}=1+cos \alpha$