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Question: If \((\cos 25\theta - i\sin 25\theta)\), then \(i(\cos 25\theta - i\sin 25\theta)\) is equal to....

If (cos⁡25θ−isin⁡25θ)(\cos 25\theta - i\sin 25\theta), then i(cos⁡25θ−isin⁡25θ)i(\cos 25\theta - i\sin 25\theta) is equal to.

A

i(cos⁡25θ+isin⁡25θ)i(\cos 25\theta + i\sin 25\theta)

B

1

C

3

D

(cos⁡25θ+isin⁡25θ)(\cos 25\theta + i\sin 25\theta)

Answer

i(cos⁡25θ+isin⁡25θ)i(\cos 25\theta + i\sin 25\theta)

Explanation

Solution

z1z_{1}.