## Reflection: Lesson Planning Complex Numbers and Trigonometry - Section 4: Converting trigonometric form to standard complex form.

As I teach I always share with students different ways they may see the information. In this unit many college professors use cis(theta) as a shorthand for cos(theta)+i sin(theta). As we work with the problems I will use this shorthand in some of my examples.  Larson's "Precalculus with Limits, 2nd ed." does not use the shorthand.  I find it important to hare other notations to prepare students for the future.

Other way to write the trigonometric form
Lesson Planning: Other way to write the trigonometric form

# Complex Numbers and Trigonometry

Unit 11: Vectors and Complex Numbers
Lesson 6 of 11

## Big Idea: How is it possible to write a complex number using trigonometric functions?

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Subject(s):
Math, Precalculus and Calculus, complex numbers, Trigonometric form of complex numbers, Polar form of complex numbers, Operations with complex number
45 minutes

### Katharine Sparks

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