InterviewSolution
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InterviewSolution
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Answer any of it. java programming! |
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Answer» Here are two for the price of one (using EULER's formula):COS(A+B)+isin(A+B)≡ei(A+B)≡eiA×eiB≡[cos(A)+isin(A)][cos(B)+isin(B)]≡[cos(A)cos(B)−sin(A)sin(B)]+i[sin(A)cos(B)+cos(A)sin(B)]Now equate imaginary PARTS to give the result for sin(A+B) (and, if you WANT, equate real parts to give the result for cos(A+B)). |
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