$\tan 1^{\circ} \tan 2^{\circ} \ldots \tan 89^{\circ}$ का मान है

  • A
    $-1$
  • B
    $1$
  • C
    $0$
  • D
    इनमें से कोई नहीं

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यदि $\frac{\cos x}{a} = \frac{\cos (x + \theta)}{b} = \frac{\cos (x + 2\theta)}{c} = \frac{\cos (x + 3\theta)}{d}$ है,तो $\left( \frac{a + c}{b + d} \right)$ का मान क्या होगा :-

$\frac{\sec 8A - 1}{\sec 4A - 1} = $

$\sqrt{2+\sqrt{2(1+\cos 4A)}}$ का मान किसके बराबर है?

यदि $7 \sin^{2} \theta + 3 \cos^{2} \theta = 4$ है,तो $\tan \theta$ का मान ज्ञात कीजिए (जहाँ $\theta$ न्यूनकोण है)।

यदि $A + B = 225^\circ$ है,तो $\frac{{\cot A}}{{1 + \cot A}} \cdot \frac{{\cot B}}{{1 + \cot B}} = $

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