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October 20, 2014

October 20, 2014

Posted by **Piwo** on Thursday, April 5, 2012 at 8:44am.

1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA

- trig - eh? -
**Steve**, Thursday, April 5, 2012 at 2:17pmcheck for typos or use parens. Not true as written

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