Is it right to say that cos(60° +30º = cos 60° cos30°-sin 60° sin – InterviewSolution

1.

Is it right to say that cos(60° +30º = cos 60° cos30°-sin 60° sin 30°.

Answer»

cos(60+30)= cos60cos30- sin60sin30; ((1/2)+(V3/2)) = =((1/2)(V3/2)-(V3/2)(1/2) ((V3/4)-(V3/4)) =0

Yes it is right to say

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