Wrong Information provided

Asked by  | 13th Feb, 2010, 07:11: PM

Expert Answer:

In case of confusion please use, 

cos(A-B) = cosAcosB + sinAsinB

cos(90-30) = cos90cos30 + sin90sin30

cos(90-30) = (0) + sin30

cos 60 = sin 30 = 1/2

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TopperLearning.

 

 

Answered by  | 13th Feb, 2010, 08:07: PM

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