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February 1, 2015

February 1, 2015

Posted by **Ilene** on Monday, May 24, 2010 at 8:27pm.

- Pre Calc! -
**Reiny**, Monday, May 24, 2010 at 9:14pmDo you not have a triangle with sides

90, 135 and 120 ?

So use the cosine law starting with

120^2 = 90^2 + 135^2 - 2(90)(135cos A , where A is the angle opposite the 120

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