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Question

If sinθ6cosθ=7cosθ. Prove that cosθ6sinθ7sinθ=1.

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Solution

sinθ6cosθ=7cosθ
tanθ=6+7
cotθ(6+7)=1
6sinθ+7sinθ=cosθ
cosθ6sinθ7sinθ=1

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