Asked by Narancia Ghirga
Which of the following is a complex fourth root of -16?
I got 2(cos90°+isin90°)
Is it okay?
I got 2(cos90°+isin90°)
Is it okay?
Answers
Answered by
oobleck
Not quite
2cis90° is a 4th root of 16
-16 = 16cis180°
so, the first 4th root is 2cis45°
2cis90° is a 4th root of 16
-16 = 16cis180°
so, the first 4th root is 2cis45°
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