यदि $2 \cos \theta + \sin \theta = 1$ $\left( \theta \neq \frac{\pi}{2} \right)$ है,तो $7 \cos \theta + 6 \sin \theta$ का मान ज्ञात कीजिए।

  • A
    $1/2$
  • B
    $46/5$
  • C
    $11/2$
  • D
    $2$

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यदि $\sin x + \sin^2 x = 1$ है,तो $\cos^{12} x + 3\cos^{10} x + 3\cos^8 x + \cos^6 x - 2$ का मान क्या होगा?

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$n > 2$ के सभी संभावित पूर्णांक मानों की संख्या ज्ञात कीजिए ताकि $\sin \frac{\pi}{2n} + \cos \frac{\pi}{2n} = \frac{\sqrt{n}}{2}$ हो।

यदि $x \sin \theta = y \sin \left( \theta + \frac{2\pi}{3} \right) = z \sin \left( \theta + \frac{4\pi}{3} \right)$ है,तो:

$\sin^2 5^\circ + \sin^2 10^\circ + \sin^2 15^\circ + \dots + \sin^2 85^\circ + \sin^2 90^\circ$ का मान ज्ञात कीजिए।

यदि $\tan A + \cot A = 4$ है,तो $\tan^4 A + \cot^4 A$ का मान क्या होगा?

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