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anonymous
 one year ago
Which of the following is a form of the law of cosines?
A) a^2=b^2+c^2+2bc*cos A
B) a^2=b^2c^2+2bc*cos A
C) b=a^2+c^22ac*cos B
D) b^2=a^2+c^22ac*cos B
anonymous
 one year ago
Which of the following is a form of the law of cosines? A) a^2=b^2+c^2+2bc*cos A B) a^2=b^2c^2+2bc*cos A C) b=a^2+c^22ac*cos B D) b^2=a^2+c^22ac*cos B

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UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.0Law of cosines looks like this \[cosA = \frac{b^2+c^2a^2}{2bc}\] \[cosB = \frac{a^2+c^2b^2}{2ac}\] \[cosC=\frac{a^2+b^2c^2}{2ab}\] to have \[a^2 \] or \[b^2\] by itself we have to manipulate this a bit.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.0forgot the \[c^2 \] case , but based on the choices you're given, I don't think you need it.
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