यदि $(\sec A + \tan A)(\sec B + \tan B)(\sec C + \tan C) = (\sec A - \tan A)(\sec B - \tan B)(\sec C - \tan C)$ है,तो प्रत्येक पक्ष का मान क्या होगा?

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

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मान ज्ञात कीजिए: $\sqrt{\sin ^4 x+4 \cos ^2 x}-\sqrt{\cos ^4 x+4 \sin ^2 x}$

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मान लीजिए $S = \{x \in R : \cos(x) + \cos(\sqrt{2}x) < 2\}$,तो

$\sin ^3 10^{\circ}+\sin ^3 50^{\circ}-\sin ^3 70^{\circ}=$

$\frac{\sqrt{2}-\sin \alpha-\cos \alpha}{\sin \alpha-\cos \alpha}=$

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