यदि $\theta = 3\alpha$ और $\sin \theta = \frac{a}{\sqrt{a^2 + b^2}}$ है,तो व्यंजक $a \csc \alpha - b \sec \alpha$ का मान क्या है?

  • A
    $2\sqrt{a^2 + b^2}$
  • B
    $\sqrt{a^2 + b^2}$
  • C
    $a + b$
  • D
    इनमें से कोई नहीं

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यदि $\tanh(x) = \frac{1}{3}$ है,तो $\tanh(3x)$ का मान क्या होगा?

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$\operatorname{cosec} 2 \theta - \cot 2 \theta = ?$

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