cos ( 3pi/4+x) + cos ( 3pi/4 - x ) = root of -2 sinx
those who give write i will mark them as brainlist
urgent plz friends try to give write answer
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PLS MARK MY ANSWER AS BRAINLIEST
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we have taken the Cos A- Cos B formula
I think there is a mistake in ur question there must be a minus sign between the two cos values then only our answer will be equal to RHS
hope it helps
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