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April 19, 2015

April 19, 2015

Posted by **Jacob** on Tuesday, November 15, 2011 at 10:40pm.

- Pre Calc -
**Reiny**, Tuesday, November 15, 2011 at 10:57pm(cos-1 (4/5))

means : find the angle Ø so that cos Ø = 4/5

so clearly secØ = 5/4

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