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Express the complex number in trigonometric form. -5i a. 5(cos 270° + i sin 270°) b. 5(cos 180° + i sin 180°) c. 5(cos 90° + i sin 90°) d. 5(cos 0° + i sin 0°)
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Express the complex number in trigonometric form. -5i

a. 5(cos 270° + i sin 270°)
b. 5(cos 180° + i sin 180°)
c. 5(cos 90° + i sin 90°)
d. 5(cos 0° + i sin 0°)

User JoG
by
7.6k points

1 Answer

1 vote
cos 270 = 0 and sin 270 =-1
so -5i from a part.
User MH Fuad
by
7.4k points
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