Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
Easy$\sin 690^{\circ} \times \sec 240^{\circ} = $
- A$1$
- B$-1$
- C$\frac{-1}{2}$
- D$\frac{1}{2}$
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यदि $A, B, C, D$ एक चक्रीय चतुर्भुज के क्रम में लिए गए कोण हैं,तो $\cos(180^{\circ} + A) + \cos(180^{\circ} - B) + \cos(180^{\circ} - C) - \sin(90^{\circ} - D) =$
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View Solution$\cos 18^{\circ} = $
मान लीजिए $\theta$ मानक स्थिति में एक कोण है ताकि बिंदु $(-5, 12)$ इसकी अंतिम भुजा पर स्थित हो। तब:
$\frac{\sin x}{1+\cos x} + \frac{1+\cos x}{\sin x} = ?$
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