Question

if cos 40° +n = sin 30°..find n​

Answer 1

Answer:

n=20°

sin 30°=sin(90°-60°)

=cos 60°

cos 40°+n= sin 30°

substitute cos 60° in the place of sin 30°

cos 40°+n=cos 60°

n=cos 60°-cos 40°

n=cos 20°

so,n=20°

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