જો $a\,\cos 2\theta + b\,\sin 2\theta = c$ ના બીજ  $\alpha$ અને $\beta$ હોય તો $\tan \alpha + \tan \beta  = . . .$

  • A

    $\frac{{c + a}}{{2b}}$

  • B

    $\frac{{2b}}{{c + a}}$

  • C

    $\frac{{c - a}}{{2b}}$

  • D

    $\frac{b}{{c + a}}$

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