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Question
Differentiate the following w.r.t.x: cos(x2 + a2)
Solution
Let y = cos(x2 + a2)
Differentiating w.r.t. x,we get,
`"dy"/"dx" = "d"/"dx"[cos(x^2 + a^2)]`
= `-sin(x^2 + a^2)."d"/"dx"(x^2 + a^2)`
= –sin(x2 + a2).(2x + 0)
= –2x sin(x2 + a2).
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