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If (cos theta + sin theta) =1 prove that (cos theta - sin theta) = + or - 1 || Trigonometry Class-10
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If `cos theta + sin theta =1` prove that `cos theta -sin theta =+-1`
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If (cos theta + sin theta) =1 prove that (cos theta - sin theta) = + or - 1 || Trigonometry Class-10
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