Question

pls pls pls help me plz tell me what to do now plz tell me

Answer 1

2is the answer apply the sq formula and
$\sin( {x}^{2} ) + \cos( {x}^{2} ) = 1$

Answer 2

Let theta be A


( sin A + cos A)^2 + ( cos A - Sin A)^2

= sin^2 A + cos^2 A + 2 sin A cos A + cos^2 A + sin^2 A - 2 sin A cos A

= 1 + 2 sin A cos A + 1 - 2 sin A cos A

= 2