MCQ
यदि $\cos ^{-1} \frac{1}{x}=\theta$, तब $\tan \theta=$
- A$\frac{1}{\sqrt{x^2-1}}$
- ✓$\sqrt{x^2-1}$
- C$\sqrt{1-x^2}$
- D$\sqrt{x^2+1}$
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