**Law of Sines**

Given AAS, ASA, and occasionally SSA

**13.1** Given the diagram below, in which *A* is opposite *a*, *B* is opposite *b*, and *C* is opposite *c*, state the law of sines.

The law of sines states that the ratio of the sine of an angle to the length of the opposite side is constant in a triangle.

You may also express the law of sines using the reciprocals of the ratios.

*Note: Problems 13.2–13.4 refer to triangle ABC below.*

**13.2** Calculate

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