यदि $\tan^2 \alpha \tan^2 \beta + \tan^2 \beta \tan^2 \gamma + \tan^2 \gamma \tan^2 \alpha + 2\tan^2 \alpha \tan^2 \beta \tan^2 \gamma = 1$ है,तो $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma$ का मान क्या है?

  • A
    $0$
  • B
    $-1$
  • C
    $1$
  • D
    इनमें से कोई नहीं

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$\sin 12^\circ \sin 48^\circ \sin 54^\circ = $

योगफल ज्ञात कीजिए: $\sin^2(3^{\circ}) + \sin^2(6^{\circ}) + \sin^2(9^{\circ}) + \dots + \sin^2(84^{\circ}) + \sin^2(87^{\circ}) + \sin^2(90^{\circ})$

व्यंजक का गुणनखंड कीजिए: $\sec ^2 x+5 \tan x+5$

$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta)^2} = $

यदि $\sec(\theta+\alpha)$,$\sec\theta$,और $\sec(\theta-\alpha)$ समांतर श्रेणी में हैं,तो $\cos\theta \cdot \sec\frac{\alpha}{2}$ का मान ज्ञात कीजिए।

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