If $x \in[-1,1]$, then the value of $\int \mathrm{e}^{\sin ^{-1}…

If $x \in[-1,1]$, then the value of $\int \mathrm{e}^{\sin ^{-1} x}\left(\frac{x+\sqrt{1-x^2}}{\sqrt{1-x^2}}\right) \mathrm{d} x$ is
  1. $\mathrm{e}^{\sin ^{-1} x}+\mathrm{c}$, where c is constant of integration.
  2. $\mathrm{e}^{\sin ^{-1} x} \cdot \sin x+\mathrm{c}$, where c is constant of integration.
  3. $\mathrm{e}^{\sin ^{-1} x} \cdot \cos x+\mathrm{c}$, where c is constant of integration.
  4. $\mathrm{e}^{\sin ^{-1} x} \cdot x+\mathrm{c}$, where c is constant of integration.

Solution

$\begin{aligned} & \text { Put } \sin ^{-1} x=\mathrm{t} \Rightarrow \frac{1}{\sqrt{1-x^2}} \mathrm{~d} x=\mathrm{dt} \\ & \therefore \quad \int \mathrm{e}^{\sin ^{-1} x}\left(\frac{x+\sqrt{1-x^2}}{\sqrt{1-x^2}}\right) \mathrm{d} x=\int \mathrm{e}^{\mathrm{t}}(\sin \mathrm{t}+\cos \mathrm{t}) \mathrm{dt} \\ & =e^t \sin \mathrm{t}+\mathrm{c} \\ & =x \mathrm{e}^{\sin ^{-1} x}+\mathrm{c} \end{aligned}$

Asked in: MHT CET 2024 (11 May Shift 1)

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