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Mathematics 18 Online
OpenStudy (anonymous):

Sec 2x= ?( more than one answer may apply) A) 1/cos^2 x - sin^2 x B) 1/ 2sin^2 x-1 C) 1/ sin^2 x - cos^2 x D) 1/ 1-2sin^2 x

OpenStudy (anonymous):

Please will medal

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