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April 21, 2015

April 21, 2015

Posted by **Paige** on Friday, February 18, 2011 at 9:42pm.

- Trig -
**Reiny**, Friday, February 18, 2011 at 10:14pmUsing tan(A+B) = (tanA + tanB)/(1-tanAtanB)

tan75

= tan(45+30)

= (tan45+tan30)/(1-tan45tan30)

= (1 + 1/√3)/(1 - (1)(1/√3)

multiply top and bottom by √3

= (√3 + 1)/(√3 - 1)

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