यदि $\sin x + \sin^{2} x = 1$ है,तो $\cos^{8} x + 2 \cos^{6} x + \cos^{4} x$ का मान क्या है?

  • A
    $3$
  • B
    $2$
  • C
    $1$
  • D
    $4$

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यदि $\cos \theta = -\frac{\sqrt{3}}{2}$ और $\sin \alpha = -\frac{3}{5}$ है,जहाँ $\theta$ तीसरे चतुर्थांश में नहीं है,तो $\frac{2 \tan \alpha + \sqrt{3} \tan \theta}{\cot^2 \theta + \cos \alpha}$ का मान ज्ञात कीजिए।

गुणनफल $(1+\tan 1^{\circ})(1+\tan 2^{\circ})(1+\tan 3^{\circ}) \dots (1+\tan 45^{\circ})$ का मान क्या है?

यदि $\pi < \alpha < \frac{3\pi}{2}$ है,तो $\sqrt{\frac{1 - \cos \alpha}{1 + \cos \alpha}} + \sqrt{\frac{1 + \cos \alpha}{1 - \cos \alpha}} = $

योगफल ज्ञात कीजिए: $\sum \frac{1}{1 + x^{a - b} + x^{a - c}}$

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

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