Math, asked by swarnaswarna9650, 3 months ago

It is right to say that cos (60degree -30degree )=cos 60degree cos 30degree - sin 60degree sin 30degree. give reasons

Answers

Answered by MansaMohanty

0

Step-by-step explanation:

cos( 60°-30°) = cos 60°cos 30°+sin 60°sin 30°

Answered by das9999

0

Answer:

No, it is not right

Step-by-step explanation:

The correct formula is :

cos(60° - 30°) = cos60°cos30° + sin60°sin30°

It is right because there is a FORMULA :

cos(A - B) = cosAcosB + sinAsinB

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