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Question

Question: \[\cos 2\alpha + \cos 2\beta + \cos 2\gamma\]...

cos⁡2α+cos⁡2β+cos⁡2γ\cos 2\alpha + \cos 2\beta + \cos 2\gamma

A

sin⁡α+sin⁡β+sin⁡γ\sin\alpha + \sin\beta + \sin\gamma

B

cos⁡α+cos⁡β+cos⁡γ=0=\cos\alpha + \cos\beta + \cos\gamma = 0 =

C

sin⁡2α+sin⁡2β+sin⁡2γ\sin^{2}\alpha + \sin^{2}\beta + \sin^{2}\gamma

D

None of these

Answer

cos⁡α+cos⁡β+cos⁡γ=0=\cos\alpha + \cos\beta + \cos\gamma = 0 =

Explanation

Solution

∣z1+z2∣2|z_{1} + z_{2}|^{2}