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Question

find the derivative of sec(x+y)=xy wrt x

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Solution

Dear Student

We are given an equation :

secx+y=xyDifferentiate with respect to x both the sides, applying chain rulesec x+y tan x+y1+dydx=xdydx+ySimplify the above equation , take common dydx on left hand side andrest of the things on the other side.x-tanx+ysecx+ydydx=tan x+y sec x+y-ydydx=tanx+ysecx+y-yx-tanx+ysecx+ywhich is the required answer.

Regards

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