Casio ClassPad II Custom Commands

cis(θ)

• θ is an angle

Returns cos(θ) + i sin(θ).

Example

Find \(\mathrm{cis} \left( -\dfrac{2\pi}{7} \right) + \mathrm{cis} \left( -\dfrac{12\pi}{7} \right)\) in the form \(A \cos(B \pi)\). (2023 Specialist Exam 2 Section B Question 2fi)

Contributed by Nhan