यदि $\sqrt{\frac{1+\cos A}{1-\cos A}}=\frac{x}{y}$ है,तो $\tan A$ का मान किसके बराबर है?

  • A
    $\frac{x^{2}+y^{2}}{x^{2}-y^{2}}$
  • B
    $\frac{2xy}{x^{2}+y^{2}}$
  • C
    $\frac{2xy}{x^{2}-y^{2}}$
  • D
    $\frac{2xy}{y^{2}-x^{2}}$

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$f(x) = 3 \sin x - 4 \sin^3 x$ दिया गया है,तो $f\left(\frac{\pi}{3}\right)$ का मान ज्ञात कीजिए।

यदि $\cos A = \frac{3}{4}$ है,तो $32\sin \frac{A}{2}\cos \frac{5A}{2} = $

$(\sec 2A + 1)\sec^2 A = $

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