CBSE BOARD X, asked by zaid6935, 1 year ago

sin25°.sin65°= cos 25°. cos65°

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Answers

Answered by SulagnaRoutray

7

yes

sin25°.sin65°=sin(90°-65°).sin(90°-25°)

=cos65°.cos25°

sin(90°-theta)=cos theta

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