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January 31, 2015

January 31, 2015

Posted by **rosemary flores** on Monday, June 6, 2011 at 3:46pm.

- algrebra 2 / trig -
**Reiny**, Monday, June 6, 2011 at 4:29pmguessing that you are describing a triangle ABC , use the cosine law

c^2 = a^2 + b^2 - 2(a)(b)cosC

= 1 + 4 - 2(1)(2)cos50

= 2.42885

c = 1.5585

Now use the sine law to find a second angle.

The use the angle sum of a triangle to find the third angle.

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