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

(this is really only part of my problem it's an optimization problem but this is where I'm stuck)

Find the zeros of: cos^2(x)-sin^(x)+cos(x)

2. Relevant equations

3. The attempt at a solution

I've been trying to use trig identities such as sin^2 + cos^2 = 1 but it's not getting me anywhere I know the answer is pi/3 because our teacher told us but I can't seem to get it.

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# Homework Help: Simplifying a trig equation

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