Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
Easyयदि $\tan \theta = \frac{20}{21}$ है,तो $\cos \theta$ का मान क्या होगा?
- A$\pm \frac{20}{41}$
- B$\pm \frac{1}{21}$
- C$\pm \frac{21}{29}$
- D$\pm \frac{20}{21}$
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$\frac{\cos 10^{\circ} + \cos 80^{\circ}}{\sin 80^{\circ} - \sin 10^{\circ}} = ?$
यदि $\alpha$ दूसरे चतुर्थांश में स्थित है,तो $\sqrt{\frac{1 - \sin \alpha}{1 + \sin \alpha}} - \sqrt{\frac{1 + \sin \alpha}{1 - \sin \alpha}} = $
Medium
View Solutionमान लीजिए $\triangle ACB$ एक त्रिभुज है जिसमें $C$ पर समकोण है। यदि $AB = 29$ इकाई,$BC = 21$ इकाई और $\angle ABC = \theta$ है,तो $\cos^2 \theta - \sin^2 \theta = $
$\left(\frac{\sin 35^{\circ}}{\cos 55^{\circ}}\right)^2+\left(\frac{\cos 55^{\circ}}{\sin 35^{\circ}}\right)^2-2 \cos 30^{\circ}=$
यदि $\cot x = \frac{3}{4}$ और $x$ तीसरे चतुर्थांश में स्थित है,तो अन्य पाँच त्रिकोणमितीय फलनों के मान ज्ञात कीजिए।
Easy
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