Question

Prove that
(sinø+cosø)^2+(sinø-cosø)^2=2

Answer 1

Answer:

${ \sin}^{2 } \alpha + \cos {}^{2} \alpha + 2 \sin \alpha \cos \alpha + \sin {}^{2} \alpha + \cos {}^{2} \alpha - 2 \sin \alpha \cos \alpha$

=1+1

$= 2$

Answer 2

Hope it's helps.....................