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

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $1/2$

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यदि $\sin x + \sin^2 x = 1$ है,तो व्यंजक $\cos^{12} x + 3\cos^{10} x + 3\cos^8 x + \cos^6 x - 1$ का मान किसके बराबर है?

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$\frac{\cos 15^{\circ} \cos^2 22\frac{1}{2}^{\circ} - \sin 75^{\circ} \sin^2 52\frac{1}{2}^{\circ}}{\cos^2 15^{\circ} - \cos^2 75^{\circ}} = $

यदि $2y \cos \theta = x \sin \theta$ और $2x \sec \theta - y \csc \theta = 3$ है,तो $x^2 + 4y^2 = $

योगफल ज्ञात कीजिए: $\sin^2(3^{\circ}) + \sin^2(6^{\circ}) + \sin^2(9^{\circ}) + \dots + \sin^2(84^{\circ}) + \sin^2(87^{\circ}) + \sin^2(90^{\circ})$

यदि $A = \sin \theta |\sin \theta|$,$B = \cos \theta |\cos \theta|$ और $\frac{99 \pi}{2} \leq \theta \leq \frac{100 \pi}{2}$ है,तो

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