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

2. Relevant equations

3. The attempt at a solution

I don't understand how they get from step 4 to step 5. Wouldn't you factor a cos x out of the brackets then have [tex](\cos x)(1-\frac{1}{6})[/tex] to the left of the brackets. Then you can multiply the [tex](1-\frac{1}{6})[/tex] inside the brackets.However that would yield [tex][\frac{5}{6}+\frac{10}{3}\sin^2x][/tex] I dont understand how they are getting 1- (1/6) times the stuff inside the brackets.

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# Homework Help: Sketching A Graph Using Differentiation

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