Math, asked by dhruwjiparasa, 5 months ago

1. cos 0 - cos 20 = sin 30

Answers

Answered by panesarh890

0

Answer:

cos(20°+θ)=sin30°

⇒cos(20°+θ)=cos(90°−30°)

⇒20°+θ=60°

⇒θ=40°

Hence, the answer is 40°.

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