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Earn +20 ptsQ: What is cosine's law how can solve this type of question?
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What are the answers to law of cosines in A plus?
The law of cosines can be written in one form as: c2 = a2 + b2 - 2abCos C. Without 3 of the 4 variables being given, there is no way to answer this question.
What is a form of the law of cosines?
The question asks about the "following". In such circumstances would it be too much to expect that you make sure that there is something that is following?
Law of cosines with a right angle?
The law of cosines with a right angle is just the pythagorean theorem. The cosine of 90 degrees is 0. That is why the hypotenuse squared is equal to the sum of both of the legs squared
Can the law of cosines be applied to right and non-right triangles?
Yes
How do you find a side of a triangle?
If it's a right triangle, use pythagorean's theorem (a2+b2=c2) to solve it. = If it's an oblique triangle, use the law of sines or cosines (see related link)
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