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September 23, 2014

September 23, 2014

Posted by **lily** on Friday, April 10, 2009 at 1:38am.

- math -
**Damon**, Friday, April 10, 2009 at 2:15am3,4,5 right triangle in quadrant 2

cos t = -4/5

tan t = sin t/cos t = -3/4

tan 2 t = 2 tan t / (1-tan^2 t)

= 2 (-3/4) / (1-9/16)

= (-3/2)/(7/16)

= -3 /(7/8)

= -24/7

=-3.43

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