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If y=cos(x+y)," then "(dy)/(dx)=...

If `y=cos(x+y)," then "(dy)/(dx)=`

A

`(cos (x + Y))/(1 + sin(x + y))`

B

`(sin (x + Y))/(1 - sin(x + y))`

C

`(-sin (x + Y))/(1 + sin(x + y))`

D

`(sin x + sin y)/(sin y - x)`

Text Solution

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The correct Answer is:
C
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