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The equation `5^(1+log_(5)cosx)=5/2`hasA. no solutionB. one solutionC. two solutionsD. more than two solutions |
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Answer» Correct Answer - D We have, `5^(1+log_(5)cosx)=(5)/(2)` ` implies1+log_(5)5+log_(5) coss=log_(5)5-log_(5)2` `implies log_(5)cos x=-log_(5)2` `implies log_(5) cos x=log_(5)2^(-1)` `implies cosx=2^(-1) implies cos x=(1)/(2) impliesx=2n pi+-(pi)/(3),n in Z` |
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