Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesMix Examples-Trigonometrical Ratios, Functions and Identities
Mediumव्यंजक $\frac{1+\sin 2 \alpha}{\cos (2 \alpha-2 \pi) \tan \left(\alpha-\frac{3 \pi}{4}\right)} - \frac{1}{4} \sin 2 \alpha \left[\cot \frac{\alpha}{2}+\cot \left(\frac{3 \pi}{2}+\frac{\alpha}{2}\right)\right]$ का मान ज्ञात कीजिए।
- A$0$
- B$1$
- C$\sin ^2 \frac{\alpha}{2}$
- D$\sin ^2 \alpha$
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$\tan 81^{\circ}-\tan 63^{\circ}-\tan 27^{\circ}+\tan 9^{\circ}$ का मान ज्ञात कीजिए।
DifficultTS EAMCET 2014
View Solutionयदि $\sin \theta + \sin^2 \theta = 1$ और $\cos^{12} \theta + a \cos^{10} \theta + b \cos^8 \theta + c \cos^6 \theta + d = 0$ है,तो:
$\operatorname{sech}^{-1}(\sin \theta)$ किसके बराबर है?
समीकरणों का निकाय: $2x \cos^2 \theta + y \sin 2\theta - 2 \sin \theta = 0$,$x \sin 2\theta + 2y \sin^2 \theta = -2 \cos \theta$,और $x \sin \theta - y \cos \theta = 0$,$\theta$ के सभी मानों के लिए,क्या कर सकता है:
$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta)^2} = $
Easy
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