${\left[ {\frac{{1 + \cos (\pi /8) + i\sin (\pi /8)}}{{1 + \cos (\pi /8) - i\sin (\pi /8)}}} \right]^8}$ का मान ज्ञात कीजिए।

  • A
    $-1$
  • B
    $0$
  • C
    $1$
  • D
    $2$

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निम्नलिखित व्यंजक को $A + iB$ के रूप में व्यक्त कीजिए: $(\cos 2\theta + i\sin 2\theta )^{ - 5} (\cos 3\theta - i\sin 3\theta )^6 (\sin \theta - i\cos \theta )^3$.

यदि $(1 + i\sqrt{3})^9 = a + ib$ है,तो $b$ का मान क्या होगा?

यदि $2x = -1 + \sqrt{3}i$ है,तो $(1 - x^2 + x)^6 - (1 - x + x^2)^6$ का मान ज्ञात कीजिए।

यदि $1, \alpha_1, \alpha_2, \ldots, \alpha_{n-1}$ इकाई के $n^{\text{th}}$ मूल हैं,तो $\sum_{1 \leq i < j \leq n-1} \alpha_i \alpha_j =$

माना $A_r = \left(x+\frac{1}{x}\right)^3 \cdot \left(x^2+\frac{1}{x^2}\right)^3 \cdot \left(x^3+\frac{1}{x^3}\right)^3 \cdots \left(x^r+\frac{1}{x^r}\right)^3$. यदि $x^2+x+1=0$ है,तो $\frac{1}{A_3}+\frac{1}{A_6}+\frac{1}{A_9}+\frac{1}{A_{12}}+\cdots \infty =$

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