Question

Write the value of sinθ cos(90-θ) + cosθ sin(90-θ)

Answer 1

$heya \\ \\ we \: know \: that \: \\ \\ 1) \: \: \: \sin(90 - \alpha ) = \cos( \alpha ) \\ \\ 2) \: \: \: \cos(90 - \alpha ) = \sin( \alpha ) \\ \\ \\ exp \\ \\ \sin( \alpha ) \times \sin( \alpha ) + \cos( \alpha ) \times \cos( \alpha ) \\ \\ \sin {}^{2} ( \alpha ) + \cos {}^{2} ( \alpha ) \\ \\ = 1 \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ have \: a \: nyc \: day \: ahead.$