Question

Which of the following complex numbers is not in trigonometric form?

1) 2 + 3i
2) 4(cos(��/4) + isin(��/4))
3) 5e^(i��/3)
4) 6 + 8i

Answer 1

The complex number that is not in trigonometric form is 6 + 8i.

Step-by-step explanation:

The complex number that is not in trigonometric form is 6 + 8i. Trigonometric form of a complex number is in the form of r(cos(θ) + isin(θ)), where r is the magnitude of the complex number and θ is the argument or angle.

Let's check each of the given options:

1. 2 + 3i: Not in trigonometric form.
2. 4(cos(π/4) + isin(π/4)): In trigonometric form.
3. 5e^(iπ/3): In trigonometric form.
4. 6 + 8i: Not in trigonometric form.

Therefore, the complex number 6 + 8i is not in trigonometric form.