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Mathematics, 04.06.2020 19:01 isabelcasillas

If cos theta = -8/17 and theta is in quadrant 3, cos 2theta= ? A.161/289 B.-161/289 C.64/289 D.-64/289
and tan 2 theta=? A. -30/217 B-30/161 C.-240/217 D.-240/161

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If cos theta = -8/17 and theta is in quadrant 3, cos 2theta= ? A.161/289 B.-161/289 C.64/289 D.-64/...

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