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October 20, 2014

October 20, 2014

Posted by **lan** on Sunday, May 8, 2011 at 4:06pm.

(A) 1 (B) 5/12 (C) 5/13 (D) 12/13 (E) None of the above.

- trig -
**Reiny**, Sunday, May 8, 2011 at 4:30pmMmmmh, aren't they asking for sin 90° ?

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