## WeBWorK Main Forum

### Trig Polynomial combining like terms?

by Jack Dockery -
Number of replies: 2

I am trying to figure out how to write a WW problem that asks to combine like terms for a trig polynomial:

Any help would be great!

### Re: Trig Polynomial combining like terms?

by Andras Balogh -

Isn't it that you just want to replace different powers of x with different trig functions?

23.b is the same as 23.a but x^2 replaced with cosine square and x replaced with cosine.

I would use the problems in Rochester/setAlgebra03Expressions as a starting point.