प्रत्येक $\theta \in R$ के लिए $(7 \cos\theta + 24 \sin\theta) \times (7 \sin\theta - 24 \cos\theta)$ का अधिकतम मान ज्ञात कीजिए।

  • A
    $25$
  • B
    $625$
  • C
    $\frac{625}{2}$
  • D
    $\frac{625}{4}$

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$\sin 10^\circ \sin 30^\circ \sin 50^\circ \sin 70^\circ$ का मान ज्ञात कीजिए।

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$\sin ^{2} 22^{\circ}+\sin ^{2} 68^{\circ}+\cot ^{2} 30^{\circ}$ का मान ज्ञात कीजिए।

$\sin 75^\circ = $

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