Question

Evaluate :
sin? 63° + sin? 270
cos? 17° + cos2 73° ,if question mark=2​

Answer 1

sin^263°+sin^227°

=sin^63°+cos^2(90°-27°)

=sin^263°+cos^263°

=1

cos^217°+ cos^273°

=sin^2(90°-17°)+cos^273°

=sin^273°+cos^273°

=1

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