The function f(x) is periodic with period 2[itex]\pi[/itex] and is defined by(adsbygoogle = window.adsbygoogle || []).push({});

f(x) = -cos(x) when -[itex]\pi[/itex]<x<0

= cos(x) when 0<x<[itex]\pi[/itex]

Sketch f from x=-3[itex]\pi[/itex] to 3[itex]\pi[/itex].

My question is, when -[itex]\pi[/itex]<x<0 and 0<x<[itex]\pi[/itex], how am I supposed to graph the function from -3[itex]\pi[/itex] to 3[itex]\pi[/itex]?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: How to sketch a function?

**Physics Forums | Science Articles, Homework Help, Discussion**