how do you know which one to use?

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- May 25th 2009, 08:43 PMtomatoeslaw of sines and law of cosines
how do you know which one to use?

- May 25th 2009, 09:02 PMpickslides
show us the question.

- May 28th 2009, 12:41 AMkelvind
Well see if you can use the sine law first and if you cant use it use the cosine law because the sine law is a lot easier to use.

- May 28th 2009, 05:26 AMSoroban
Hello, tomatoes!

Generally, I found this to be true.

. . Given two angles and one side: Law of Sines

. . Given one angle and two sides: Law of Cosines