# Answer to Question #42426 in Complex Analysis for shasha

Question #42426

Express the complex number in trigonometric form.

2i

help me please

2i

help me please

Expert's answer

2i=|z|(cos(alpha)+i*sin(alpha))=2(cos(pi/2)+isin(pi/2)) is a trigonometric form of the complex number (the answer is the same for cases when a polar angle ranges from -pi to pi and when a polar angle ranges from 0 to 2*pi).

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