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Solving for a side of the triangle with the law of cosines. (4:38)
Sideof a triangle is 12 and side
of a triangle is 9, and the angle contained between them is 87 degrees. What is the length of the other side of the triangle? Solution:
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Solving for an angle with the law of cosines. (6:41)
Given a triangle with base 60and other sides 50
and 20
, find the angle
between the base and the longer side of the triangle. Solution:
degrees.
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Solve a triangle using the law of cosine
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Proof of the law of cosines (9:26)