kayleebeaton kayleebeaton

20-02-2017
Mathematics

contestada

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°)

Respuesta :

Amena2000 Amena2000

25-02-2017

cos 270 = 0 and sin 270 =-1
so -5i from a part.

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