Ifsin $\left(x+\frac{\pi}{3}\right)+\sin \left(x-\frac{\pi}{3}\right)=1$, then the value of $x$ in the…

Ifsin $\left(x+\frac{\pi}{3}\right)+\sin \left(x-\frac{\pi}{3}\right)=1$, then the value of $x$ in the interval $[0, \pi]$
  1. $\frac{\pi}{2}$
  2. $\frac{\pi}{3}$
  3. $0$
  4. $\frac{\pi}{4}$

Solution

$\sin \left(x+\frac{\pi}{3}\right)+\sin \left(x-\frac{\pi}{3}\right)=1$ $\Rightarrow \quad 2 \sin x \cdot \cos \frac{\pi}{3}=1$ $[\because 2 \sin A \cdot \cos B=\sin (A+B)+\sin (A-B)]$ $\Rightarrow \quad 2 \sin x \cdot \frac{1}{2}=1$ $\sin x=1 \Rightarrow x=\frac{\pi}{2} \quad[\because x \in[0, \pi]]$

Asked in: AP EAMCET 2022 (07 Jul Shift 1)

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