Elisa A.
asked • 04/29/22precalc homework
If sin(x)=11/25 (in Quadrant-I), find cos(2x)
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1 Expert Answer
cos(2x) = 1 - 2sin(x)^2
sin(x) given as 11/25, so
cos(2x) = 1 - 2 * (11/25)^2 = 1 - 242/625 = 383/625
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Brenda D.
04/29/22