Question

y = cosu , u = -x/3
differentiate ​

Answer 1

Hi !!

Solution :- y = cosu

Differentiating y = cosu with respect to x

dy/dx = d(cosu)/dx

dy/dx = - sinu ----+-+(1)

And now diffrentiating u = -x/3 w.r to x

dy/dx = d(-x/3)/dy

dy/dx = -1/3 ---------(2)

from (1) and (2)

dy/dx = -sinu (-1/3)

dy/dx = sinu/3 Answer ✔

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Hope it helps you !!!

@Raj❤