The complex number -5i has the complex trigonometric form of 5(cos 270° + isin270º)
1 answer:
Answer:
True
Step-by-step explanation:
Evaluating the proposed trigonometric form, we get ...
5(cos(270°) +i·sin(270°))
= 5·cos(270°) +5i·sin(270°)
= 5·0 +5i·(-2)
= 5i
The statement is true.
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