यदि $0 < \theta < \frac{\pi}{2}$ और $\sin \theta \cos \theta = \frac{12}{25}$ है,तो $\sin^4 \theta + \cos^4 \theta$ का मान ज्ञात कीजिए।

  • A
    $\frac{327}{625}$
  • B
    $\frac{337}{625}$
  • C
    $\frac{347}{625}$
  • D
    $\frac{340}{625}$

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यदि $\sin^4 \alpha + 4 \cos^4 \beta + 2 = 4\sqrt{2} \sin \alpha \cos \beta$ और $\alpha, \beta \in [0, \pi]$ है,तो $\cos(\alpha + \beta)$ का मान ज्ञात कीजिए।

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