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

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# How to sketch a function?

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