CBSE Class 11-science Answered
Prove
Asked by | 16 Sep, 2008, 07:41: PM
Expert Answer
cos6A-sin6A=(cos2A)3-(sin2A)3=(cos2A-Siin2A)(Cos4A+Sin4A+Cos2ASin2A)
=cos2A((cos2A+Sin2A)2-sin2Acos2A)=cos2A(1-1/4 sin22A)
Answered by | 17 Sep, 2008, 11:55: AM
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