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iren2701 [21]
3 years ago
11

The complex number -5i has the complex trigonometric form of 5(cos 270° + isin 270)

Mathematics
1 answer:
Verizon [17]3 years ago
5 0

Answer:

True ,   -5i =  5*(0 - i) =  5*( cos 3π/2  + i*sin 3π/2)  = 5*(cos 270 + i*sin 270)

Step-by-step explanation:

5*( cos 3π/2 radians  + i*sin 3π/2 radians)  = 5*(cos 270 degrees + i*sin 270 degrees)

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Answer:

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Step-by-step explanation:

step 1

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we have

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substitute in the formula

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step 2

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we have

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we know that

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substitute in the formula

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