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Question
Differentiate the function with respect to x.
`cos (sqrtx)`
Solution
cos `(sqrtx)`
Let y = cos `(sqrtx)` and `sqrtx` = u.
Then y = cos u
`dy/dx = dy/du xx du/dx`
`= (d cos u)/du xx (d sqrtx)/dx`
`= - sin u xx 1/2 sqrtx`
`= - (sin sqrtx)/(2 sqrtx)`
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