(FAB) Let f (x, y) ,find the x – Y value of fæ + fy 1 x – Y 1 (x – y)² O (x+ 3) (x – y)² o (x+ y) (x – y)²

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A: Explanation of the answer is as follows

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A: Given,           cosx=-12

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A: A detailed solution is given below.

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Q: Solve 6 sin 4 for the four smallest positive solutions

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