Question

$sin^{4} \alpha +cos^{2} \alpha + sin^{2} \alpha * cos^{2} \alpha$


УПРОСТИТЕ

Answer 1

Ответ:

$\sin ^{4} ( \alpha ) + { \sin( \alpha ) }^{2} { \cos( \alpha ) }^{2} + { \cos( \alpha ) }^{2} = \\ { \sin( \alpha ) }^{2} ( { \sin( \alpha ) }^{2} + { \cos( \alpha ) }^{2} ) + { \cos( \alpha ) }^{2} = \\ { \sin( \alpha ) }^{2} + { \cos( \alpha ) }^{2} = 1$