यदि $x=3 \sqrt{2} \cos ^3 \theta$ और $y=4 \tan ^2 \theta$ है, तो $\left(\frac{d y}{d x}\right)_{\theta=\frac{\pi}{4}} = $

  • A
    $\frac{32 \sqrt{2}}{9}$
  • B
    $\frac{16}{9}$
  • C
    $-\frac{32}{9}$
  • D
    $\frac{32}{9}$

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वक्र $x = t^2 + 3t - 8$ और $y = 2t^2 - 2t - 5$ के लिए बिंदु $t = 2$ पर स्पर्श रेखा की ढाल क्या है?

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