Pre-calculus Help Please! Express the complex number in trigonometric form. 3 A. 3(cos 0° + i sin 0°) B. 3(cos 90° + i sin 90°) C. 3(cos 180° + i sin 180°) D. 3(cos 270° + i sin 270°)

1 answer
Question:

Pre-calculus Help Please! Express the complex number in trigonometric form.
3
A. 3(cos 0° + i sin 0°)
B. 3(cos 90° + i sin 90°)
C. 3(cos 180° + i sin 180°)
D. 3(cos 270° + i sin 270°)

Answers

we have that 3 = 3 + 0i -----------> rewrite as 3(1 + 0i) So now what we have to do is figure out which of the above expressions has cos a = 1 and sin a = 0. cos 0 = 1, and sin 0 = 0, so that's the answer that we want. the answer is: 3 = 3(cos 0 + i sin 0)

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