Math, asked by MysticalRainbow, 6 months ago

cos (A + B) = cos A cos B - sin A sin B.
A- 60 and B-30

Answers

Answered by tiwaririya632

2

hence its prove that

LHS =RHS

Attachments:

Answered by devinichenametla

0

Answer:

cos90=cos60cos30-sin60sin30

=0

hope it helps you

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