$\tan \left(\sin ^{-1}\left(\frac{3}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ ની કિંમત શોધો.

જો $\operatorname{Tan}^{-1}\left[\frac{1}{1+1(2)}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(2)(3)}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(3)(4)}\right]+\cdots+\operatorname{Tan}^{-1}\left[\frac{1}{1+n(n+1)}\right]=\operatorname{Tan}^{-1} \theta$ હોય,તો $\theta=$

ધારો કે $f(\theta) = \sin ( \tan ^{-1} ( \frac{\sin \theta}{\sqrt{\cos 2 \theta}} ) )$,જ્યાં $-\frac{\pi}{4} < \theta < \frac{\pi}{4}$,તો $\frac{d}{d(\tan \theta)}(f(\theta))$ નું મૂલ્ય શોધો.

જો $\cot^{-1} \alpha + \cot^{-1} \beta = \cot^{-1} x$ હોય,તો $x = $

જો $\alpha \leq 2 \sin^{-1} x + \cos^{-1} x \leq \beta$ હોય,તો

$\tan \left\{\frac{1}{2} \sin ^{-1}\left(\frac{2 x}{1+x^2}\right)+\frac{1}{2} \cos ^{-1}\left(\frac{1-y^2}{1+y^2}\right)\right\}$ નું મૂલ્ય શું છે?