Question

if m equal to cos theta minus sin theta and an equal to cos theta + sin theta then the value of sec square theta is​

Answer 1

Answer:

m=cosθ−sinθ        n=cosθsinθ

nm+mn=mnm+n

m+n=cosθ−sinθ+cosθ+sinθ=2cosθ

mn=(cosθ−sinθ)(cosθ+sinθ)

=cos2θ−sin2θ

=cos2θ

mnm+n=cos2θ2cosθ=2cos2θ−sin2θcos2θ

=2