Answer 1

Упростить:

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

Answer 2

Hello! How can I assist you today?