Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of multiple and sub-multiple angles
Easyयदि $\cos \theta = \frac{1}{2}\left( a + \frac{1}{a} \right)$ है,तो $\cos 3\theta$ का मान क्या है?
- A$\frac{1}{8}\left( a^3 + \frac{1}{a^3} \right)$
- B$\frac{3}{2}\left( a + \frac{1}{a} \right)$
- C$\frac{1}{2}\left( a^3 + \frac{1}{a^3} \right)$
- D$\frac{1}{3}\left( a^3 + \frac{1}{a^3} \right)$
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यदि $\tan \theta + \tan \left(\theta + \frac{\pi}{3}\right) + \tan \left(\theta + \frac{2\pi}{3}\right) = 3$ है,तो निम्नलिखित में से कौन सा $1$ के बराबर है?
DifficultAP EAMCET 2008
View Solutionयदि $\sin \theta = -\frac{4}{5}$ और $\theta$ तीसरे चतुर्थांश में स्थित है,तो $\cos \frac{\theta}{2} = $
Easy
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