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$\tan\theta = \frac{\sin\alpha-\cos\alpha}{\sin\alpha+\cos\alpha}$ હોય , તો ......... .

• A
  $\sin\alpha+\cos\alpha=\pm\sqrt{2}\sin\theta$
• B
  $\sin\alpha+\cos\alpha=\pm\sqrt{2}\sin\theta$
• C
  $\sin\alpha+\cos\alpha=\sqrt{2}\cos\theta$
• ✓
  $\sin\alpha=\cos\alpha$