Pre-Cal Question? (Length)?

I'm going to try to explain the figure to the best of my ability. Side AB of the triangle is 18. Side BC is x. Side AC is 8. The angle coming from angle C is 130 degrees.

2007-12-02 13:39:57 · 1 answers · asked by aha51806 2 in Science & Mathematics ➔ Mathematics

1 answers

To find x use cosine rule.

http://en.wikipedia.org/wiki/Law_of_cosines

The result is x = 11.78.

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2007-12-02 15:22:47 · answer #1 · answered by oregfiu 7 · 1⤊ 0⤋

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