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February 27, 2015

February 27, 2015

Posted by **cindi** on Monday, August 13, 2012 at 3:58pm.

- trig -
**Steve**, Monday, August 13, 2012 at 5:24pmsin

^{ -1}as principal values in [-π/2,π/2]

sin^{ -1}-.5 = -π/6

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