Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesMix Examples-Trigonometrical Ratios, Functions and Identities
Difficultमान ज्ञात कीजिए: $(\cos 252^{\circ} - \sin 126^{\circ})(\cos 252^{\circ} + \sin 126^{\circ})(\sin^2 126^{\circ} + \sin^2 186^{\circ} + \sin^2 66^{\circ})$
- A$\frac{3 \sqrt{5}}{8}$
- B$\frac{-3 \sqrt{5}}{8}$
- C$\frac{-3 \sqrt{5}}{4}$
- D$\frac{3 \sqrt{5}}{4}$
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Similar Questions
मान ज्ञात कीजिए: $\cos \frac{\pi}{7} \cos \frac{2 \pi}{7} \cos \frac{3 \pi}{7} \cos \frac{\pi}{14} \cos \frac{3 \pi}{14} \cos \frac{5 \pi}{14}$
यदि $|\sin \alpha - \cos \alpha| = \frac{3}{4}$ है,तो $|\sec 2\alpha - \tan 2\alpha| = $
यदि एक समकोण त्रिभुज की भुजाएँ ${\cos2\alpha + \cos2\beta + 2\cos(\alpha + \beta )}$ और ${\sin2\alpha + \sin2\beta + 2\sin(\alpha + \beta )}$ हैं,तो कर्ण की लंबाई क्या है:
$\cos^2 10^o - \cos 10^o \cos 50^o + \cos^2 50^o$ का मान क्या है?
DifficultJEE MAIN 2019
View Solutionयदि $\sin \theta + 2 \cos \theta = 1$ और $\theta$ चौथे चतुर्थांश ($4^{\text{th}}$ quadrant) में स्थित है (निर्देशांक अक्षों पर नहीं),तो $7 \cos \theta + 6 \sin \theta = $
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