Question

y = cos (x + y) find the dy/dx​

Answer 1

Step-by-step explanation:

hope this helps you if yes

Answer 2

Answer:

we know that,

cosx+y=cosxcosy-sinxsiny

Now dy/dx would be

first apply muplication theorem in cosxcosy and then in sinx siny

It would result in

(-sinxcosy-cosxsiny ) - (cosxsiny+sinxcosy)

Final answer would be

-2cosxsiny