Question

cos alpha multiply with cos2alpha​

Answer 1

QUESTION :

cos alpha multiply with cos2alpha.

ANSWER :

GIVEN :

cos alpha multiply with cos2alpha.

$\cos( \alpha ) \times \cos(2 \alpha )$

$2 { \cos( \alpha ) }^{2}$

FINAL ANSWER :

$2 { \cos( \alpha ) }^{2}$