COMPLEX NUMBERS Polar Form Conversions (Page 3 of 11)

If radians are desired, put the calculator in Radian mode first. Let's repeat the previous step, but obtain the argument in radians.

 MODE key. [Radian] ENTER key.

 2nd QUIT key. 2nd ENTRY key. ENTER key.

 Calculator screen image. Calculator screen image.

So, the polar form of -1-sqrt(3)*i is either 2cis( -120°) or approximately 2cis(-2.09) in radians.
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