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The solution of the differential equation cos x cos y dx +
sin x sin y dy = 0 is

Answer Posted / yasheen shahi

divide by SINx*COSy throughout.
this gives
(cosx/sinx)dx+(siny/cosy)dy=0
This is nothing but the derivative of
log(sinx)-log(cosy)

Is This Answer Correct ?    19 Yes 7 No



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