\(\rm \frac{\cos\theta+i\sin\theta}{\cos\theta-i\sin\theta}\) का मान क्या है?

  1. 1
  2. cos 2θ - i sin 2θ
  3. cos 2θ + i sin 2θ
  4. इनमें से कोई नहीं

Answer (Detailed Solution Below)

Option 3 : cos 2θ + i sin 2θ
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Detailed Solution

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अवधारणा:

यूलर का सूत्र:

एक सम्मिश्र संख्या z = cos θ + i sin θ को e के रूप में भी लिखा जा सकता है।

गणना:

यूलर के सूत्र से हम जानते हैं कि:

\(\rm \frac{\cos\theta+i\sin\theta}{\cos\theta-i\sin\theta}=\frac{e^{i\theta}}{e^{-i\theta}}\) = e2iθ = cos 2θ + i sin 2θ

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