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

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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मान लीजिए $f_k(x) = \frac{1}{k}(\cos^k x + \sin^k x)$ जहाँ $k \in \mathbb{N}$ है। $f_6(x) - f_4(x)$ का मान ज्ञात कीजिए।

$\cos ^3\left(\frac{\pi}{8}\right) \cos \left(\frac{3 \pi}{8}\right)+\sin ^3\left(\frac{\pi}{8}\right) \sin \left(\frac{3 \pi}{8}\right) = $

यदि $y = (1 + \tan A)(1 - \tan B)$ जहाँ $A - B = \frac{\pi}{4}$ है,तो $(y + 1)^{y + 1}$ का मान ज्ञात कीजिए।

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$\text{यदि } \sin(\alpha+\beta)=1, \sin(\alpha-\beta)=\frac{1}{2}, \alpha, \beta \in [0, \frac{\pi}{2}], \text{ तो } \tan(\alpha+2\beta) \cdot \tan(2\alpha+\beta) = ?$

यदि $\frac{\sin^4 x}{2} + \frac{\cos^4 x}{3} = \frac{1}{5}$ है,तो $27 \sec^6 x + 8 \operatorname{cosec}^6 x = $

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