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July 28, 2014

July 28, 2014

Posted by **Cynthia** on Saturday, October 15, 2011 at 6:39pm.

- Trig -
**Steve**, Saturday, October 15, 2011 at 7:15pmtan 5pi/6 = -1/√3

tan x/2 = (1-cos(x))/sin(x)

cos 5pi/6 = -√3/2

sin 5pi/6 = 1/2

tan 5pi/12 = (1 + √3/2)/(1/2)

= 2 + √3

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