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OpenStudy (anonymous):
sec2x = _______. Check all that apply. A. 1/2sin^2x-1 B. 1/1-2sin^2x C. 1/sin^2x-cos^2x D. 1/cos^2x-sin^2x Trying to help my little sister with her homework, my trig is a little foggy can someone help me out?
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