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Mathematics 17 Online
OpenStudy (anonymous):

Find the m

OpenStudy (jdoe0001):

got picture?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

OpenStudy (anonymous):

Can you help me @jdoe0001

OpenStudy (anonymous):

someone help!!!

OpenStudy (jdoe0001):

hmmm have you covered the Law of Cosines yet?

OpenStudy (anonymous):

yes. I tried solving it but I don't get the any correct answers.

OpenStudy (jdoe0001):

ok so so let us use the law of cosines to get angle T so we have all sides so sides t = 7 s = 10 r = 11 thus \(\bf \textit{Law of Cosines}\\ \quad \\ t^2 = {\color{blue}{ r}}^2+{\color{red}{ s}}^2-(2{\color{blue}{ r}}{\color{red}{ s}})cos(T)\\ \quad \\ cos(T)=\cfrac{{\color{blue}{ r}}^2+{\color{red}{ s}}^2-t^2}{2{\color{blue}{ r}}{\color{red}{ s}}}\implies \measuredangle T=cos^{-1}\left(\cfrac{{\color{blue}{ r}}^2+{\color{red}{ s}}^2-t^2}{2{\color{blue}{ r}}{\color{red}{ s}}}\right) \\ \quad \\ \measuredangle T=cos^{-1}\left(\cfrac{{\color{blue}{ 11}}^2+{\color{red}{ 10}}^2-7^2}{2{\color{blue}{ (11)}}{\color{red}{ (10)}}}\right)\)

OpenStudy (anonymous):

Thank you!

OpenStudy (jdoe0001):

yw

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