Question

Cos ×cos×cos+sin×sin×sin÷cos+sin +cos×cos×cos-sin×sin×sin÷cos -sin =2

Answer 1

hope it will be helpful.

Answer 2

Answer:

$\cos( \alpha ) \times \cos( \alpha ) \times \cos( \alpha ) + \sin( \alpha ) \times \sin( \alpha ) \times \sin( \alpha ) \div \cos( \alpha ) + \sin( \alpha ) + \cos( \alpha ) \times \cos( \alpha ) \times \cos( \alpha ) - \sin( \alpha \times \sin( \alpha ) \times \sin( \alpha ) \div \cos( \alpha - \sin( \alpha ) ) \\ = \cos {}^{3} ( \alpha ) + \sin {}^{2} ( \alpha ) \times \frac{ \sin( \alpha ) }{ \cos( \alpha ) } + \sin( \alpha ) + \cos {}^{3} ( \alpha ) - \sin {}^{2} ( \alpha ) \times \frac{ \sin( \alpha ) }{ \cos( \alpha ) } - \sin( \alpha ) \\ = 2 \cos {}^{3} ( \alpha )$