$\frac{\sin ^2(-160^{\circ})}{\sin ^2 70^{\circ}} + \frac{\sin (180^{\circ}-\theta)}{\sin \theta} = $

  • A
    $\sec ^2(20^{\circ})$
  • B
    $\cot ^2(20^{\circ})$
  • C
    $\tan ^2(20^{\circ})$
  • D
    $\operatorname{cosec}^2(20^{\circ})$

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$\sin 18^{\circ}$ નું મૂલ્ય શું છે?

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