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Mathematics 22 Online
OpenStudy (ohohaye):

Am I Right???

OpenStudy (ohohaye):

OpenStudy (usukidoll):

the law of cosines (also known as the cosine formula or cosine rule) relates the lengths of the sides of a triangle to the cosine of one of its angles.

OpenStudy (ohohaye):

Wait, so am I right???

OpenStudy (anonymous):

Law of Cosines \[a^2 = b^2 + c^2 - 2bc * \cos(A)\]\[b^2 = a^2 + c^2 - 2ac * \cos(B)\]\[c^2 = a^2 + b^2 - 2ab * \cos(c)\]

OpenStudy (anonymous):

\[c^2 = a^2 + b^2 - 2abcos(\theta)\]\[10.2^2 = 9.8^2 + 5.7^2 - 2(9.8)(5.7)\cos (\theta)\]\[104.04 = 96.04 + 32.49 - (19.6)(5.7) \cos(\theta)\]\[104.04 = 96.04 + 32.49 - 111.72\cos(\theta)\]\[104.04 = 128.53 - 111.72\cos(\theta)\]\[104.04 - 128.53 = - 111.72\cos(\theta)\]\[-24.49 = -111.72\cos(\theta)\]\[\frac{ -24.49 }{ -111.72 } = \cos(\theta)\]\[0.219209 = \cos(\theta)\]

OpenStudy (surana):

Considering her lack of appearance, I'm just going to assume she went to bed. Or whatever. I wouldn't know.

OpenStudy (surana):

I think you're correct.

OpenStudy (surana):

I could ask around if you have doubts.

OpenStudy (anonymous):

bananas

OpenStudy (anonymous):

HAIRY APE TOES SUCK THEM

OpenStudy (surana):

Stop spamming or I'm calling a mod.

OpenStudy (surana):

I was addressing hairyboy here, not you guys.

OpenStudy (triciaal):

I think the first is true need to prove

OpenStudy (anonymous):

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