It is right to say that cos (60degree -30degree )=cos 60degree cos 30degree - sin 60degree sin 30degree. give reasons
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Step-by-step explanation:
cos( 60°-30°) = cos 60°cos 30°+sin 60°sin 30°
Answered by
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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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