જો y(x) = cot^{-1}left(frac{sqrt{1+sin x} + s | vedclass

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(A) આપેલ છે કે $y(x) = \cot^{-1}\left(\frac{\sqrt{1+\sin x} + \sqrt{1-\sin x}}{\sqrt{1+\sin x} - \sqrt{1-\sin x}}\right)$.$1 \pm \sin x = \left(\cos \

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$-\frac{1}{2}$

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(A) આપેલ છે કે $y(x) = \cot^{-1}\left(\frac{\sqrt{1+\sin x} + \sqrt{1-\sin x}}{\sqrt{1+\sin x} - \sqrt{1-\sin x}}ight)$.$1 \pm \sin x = \left(\cos \frac{x}{2} \pm \sin \frac{x}{2}ight)^2$ હોવાથી,$\sqrt{1+\sin x} = |\cos \frac{x}{2} + \sin \frac{x}{2}|$ અને $\sqrt{1-\sin x} = |\cos \frac{x}{2} - \sin \frac{x}{2}|$ મળે.$x \in \left(\frac{\pi}{2}, \piight)$ માટે,$\frac{x}{2} \in \left(\frac{\pi}{4}, \frac{\pi}{2}ight)$ થાય. આ અંતરાલમાં,$\cos \frac{x}{2} > 0$,$\sin \frac{x}{2} > 0$,અને $\sin \frac{x}{2} > \cos \frac{x}{2}$ છે.તેથી,$\sqrt{1+\sin x} = \cos \frac{x}{2} + \sin \frac{x}{2}$ અને $\sqrt{1-\sin x} = \sin \frac{x}{2} - \cos \frac{x}{2}$ થાય.આ કિંમતો $y(x)$ માં મૂકતા:$y(x) = \cot^{-1}\left(\frac{(\cos \frac{x}{2} + \sin \frac{x}{2}) + (\sin \frac{x}{2} - \cos \frac{x}{2})}{(\cos \frac{x}{2} + \sin \frac{x}{2}) - (\sin \frac{x}{2} - \cos \frac{x}{2})}ight) = \cot^{-1}\left(\frac{2\sin \frac{x}{2}}{2\cos \frac{x}{2}}ight) = \cot^{-1}(	an \frac{x}{2})$.$\cot^{-1}(	an 	heta) = \frac{\pi}{2} - 	heta$ નો ઉપયોગ કરતા,$y(x) = \frac{\pi}{2} - \frac{x}{2}$ મળે.તેથી,$\frac{dy}{dx} = -\frac{1}{2}$.

જો $y(x) = \cot^{-1}\left(\frac{\sqrt{1+\sin x} + \sqrt{1-\sin x}}{\sqrt{1+\sin x} - \sqrt{1-\sin x}}\right)$,જ્યાં $x \in \left(\frac{\pi}{2}, \pi\right)$,તો $x = \frac{5\pi}{6}$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

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