यदि $\tan \left( \frac{\pi}{4} + \theta \right) + \tan \left( \frac{\pi}{4} - \theta \right) = \lambda \sec 2\theta$ है,तो $\lambda$ =

  • A
    $3$
  • B
    $4$
  • C
    $1$
  • D
    $2$

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$\cos^4 \frac{\pi}{8} + \cos^4 \frac{3\pi}{8} + \cos^4 \frac{5\pi}{8} + \cos^4 \frac{7\pi}{8} = $

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$f(x) = \sin x + \cos x$ का अधिकतम मान क्या है?

$\sqrt{3} \csc 20^\circ - \sec 20^\circ = $

यदि $A + B + C = \pi$ है,तो $\tan^2 \frac{A}{2} + \tan^2 \frac{B}{2} + \tan^2 \frac{C}{2}$ हमेशा क्या होगा?

यदि $\cos (A - B) = \frac{3}{5}$ और $\tan A \tan B = 2$ है,तो

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