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OpenStudy (anonymous):
Given that θ is in Quadrant 1 and secθ = 3, what is cos θ/2? I was wondering how would I solve this problem. I know that the answer is sqrt(2/3) but I want to see the work to get there. Thanks.
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OpenStudy (raden):
hint : cos θ/2 = sqrt{(1-cosθ)/2}
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