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? asked in Science & MathematicsMathematics · 6 years ago

Converting complex numbers to polar and exponential form?

I need some help converting the following complex numbers into polar and exponential form:

a) sin(2pi/5) + icos(2pi/5)

b) cos(2pi/5) - isin(2pi/5)

Any help would be greatly appreciated!

1 Answer

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  • Philip
    Lv 6
    6 years ago
    Favorite Answer

    a) z = sin(2pi/5) + icos(2pi/5). Now pi/2 - 2pi/5 = pi/10 and z = cos(pi/10) + isin(pi/10) = e^(ipi/10).

    b) Z = cos(2pi/5) - isin(2pi/5) = cos(-2pi/5) + isin(-2pi/5) = e^(-2ipi/5).

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