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I am not sure I did this right and beyond this I am not sure how to find all answers within the domain, please help

I am not sure I did this right and beyond this I am not sure how to find all answers-example-1

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π/6 is correct, keep in mind that the cosine is also positive in the IV quadrant, so that means 11π/6 is another one.

that's going around the circle once, now, going again, we end up at the twin of π/6, which will be 13π/6, and the other twin on the IV quadrant, 23π/6.
User Arpit Shukla
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