(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

f(x)=x — cosx, 0 ≤ x ≤ 2∏

2. Relevant equations

3. The attempt at a solution

I took the derivative of the function: f'(x)=1+ sinx, 0 ≤ x ≤ 2∏

I don't know how to determine whether it is increasing or decreasing between the interval given. What should I do?

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# Increase and Decrease of a function question

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