यदि $\tan \theta - \cot \theta = a$ और $\sin \theta + \cos \theta = b$ है,तो ${({b^2} - 1)^2}({a^2} + 4)$ का मान ज्ञात कीजिए।

  • A
    $2$
  • B
    $-4$
  • C
    $\pm 4$
  • D
    $4$

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यदि $\operatorname{cosec}^2(\alpha+\beta)-\sin^2(\beta-\alpha)+\sin^2(2\alpha-\beta)=\cos^2(\alpha-\beta)$ जहाँ $\alpha, \beta \in (0, \frac{\pi}{2})$ है,तो $\sin(\alpha-\beta)$ का मान ज्ञात कीजिए।

यदि $\cosh x = \frac{4}{3}$ है,तो $3 \cosh x + 3^2 \cosh 2x + 3^3 \cosh 3x = $

यदि $\frac{3\pi}{4} < \alpha < \pi$ है,तो $\sqrt{\csc^2 \alpha + 2\cot \alpha}$ का मान क्या होगा?

समीकरण $2 \cos(e^x) = 5^x + 5^{-x}$ के हलों की संख्या है:

$\cos ^2 5^{\circ}-\cos ^2 15^{\circ}-\sin ^2 15^{\circ}+\sin ^2 35^{\circ}+\cos 15^{\circ} \sin 15^{\circ}-\cos 5^{\circ} \sin 35^{\circ} = $

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