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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Differentiate the following w.r.t.x: cot(logx2)-log(cotx2)

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प्रश्न

Differentiate the following w.r.t.x: `cot(logx/2) - log(cotx/2)`

बेरीज
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उत्तर

Let y = `cot(logx/2) - log(cotx/2)`
Differentiating w.r.t. x, we get

`"dy"/"dx" = "d"/"dx"[cot(logx/2) - log(cotx/2)]`

= `"d"/"dx"[cot(logx/2)] - "d"/"dx"[log(cotx/2)]`

= `-"cosec"^2(logx/2)."d"/"dx"(logx/2) - (1)/((cotx/2))."d"/"dx"(cotx/2)`

= `-"cosec"^2(logx/2) xx 1/2 xx 1/x - 2/cotx xx 1/2 xx (-"cosec"^2x)`

= `-("cosec"^2(logx/2))/(2x) + tanx."cosec"^2x`.

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पाठ 1: Differentiation - Exercise 1.1 [पृष्ठ १२]

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