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Question: Answered & Verified by Expert
If $f(x)=\sin ^2 x$ and the composite function $g\{f(x)\}=\sin x \mid$, then the function $g(x)$ is equal to
MathematicsFunctionsJEE Main
Options:
  • A $\sqrt{x-1}$
  • B $\sqrt{x}$
  • C $\sqrt{x+1}$
  • D $-\sqrt{x}$
Solution:
2307 Upvotes Verified Answer
The correct answer is: $\sqrt{x}$
$\begin{aligned} & (g \circ f)(x)=|\sin x| \text { and } f(x)=\sin ^2 x \\ & \Rightarrow g\left(\sin ^2 x\right)=|\sin x| ; \therefore g(x)=\sqrt{x}\end{aligned}$

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