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If (a+√2bcosx)(a−√2bcosy)=a2−b2, where a>b>0, then dxdy at (π4,π4) is |
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Answer» If (a+√2bcosx)(a−√2bcosy)=a2−b2, where a>b>0, then dxdy at (π4,π4) is |
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