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khanacademy's profile
Khan Academy
Khan Academy
Khan Academy
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@khanacademy

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Khan AcademyVerified account

@khanacademy

Working to make a free, world-class education available for anyone, anywhere. http://khanacademy.org 

Mountain View, CA
khanacademy.org
Joined October 2008

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    Khan Academy‏Verified account @khanacademy 20 Jun 2014
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    @The_Phaneron To give you a hint this one uses law of cosines. You can also practice the skill here: http://bit.ly/1smJDhL 

    12:07 PM - 20 Jun 2014
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