Question

Q. 7. The derivatives of Cos (log x +
x3)​

Answer 1

ANSWER: Let y=cos(logx +3)

Differentiating both sides wrt x

Therefore,dy/dx=-sin(logx+3).d/dx(logx +3)

or dy/dx=-sin(logx+3).(1/x +0)

or dy/dx=-sin(logx+3)/x.

THAT'S YOUR REQUIRED ANSWER..