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If y=e^(tanx) , then (cos^2x)y2= (1-sin...

If `y=e^(tanx)` , then `(cos^2x)y_2=` `(1-sin2x)y_1` (b) `-(1+sin2x)y_1` (c) `(1+sin2x)y_1` (d) none of these

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