MCQ
જો ${{\tan }^{-1}}x+{{\tan }^{-1}}2x+{{\tan }^{-1}}3x=\pi $ તો
- A$x=0$
- B$x=-1$
- ✓$x=1$
- D$x\in \phi $
$\tan^{-1} + \tan^{-1} 2x +\tan^{-1} 3x = \pi$
અહી $\alpha, \beta, \gamma$ ધારી $sum$કરતો
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