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Mathematics 16 Online
OpenStudy (anonymous):

Please help http://prntscr.com/4uv9jd

zepdrix (zepdrix):

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zepdrix (zepdrix):

Hey Virg :) Looks like we can probably use the Law of Cosines for this problem.

zepdrix (zepdrix):

\[\Large\rm c^2=a^2+b^2-2ab \cos \mathcal C\]That formula, yah? :d

zepdrix (zepdrix):

\[\Large\rm c^2=4.7^2+6.1^2-2(4.7)(6.1)\cos47^o\]

zepdrix (zepdrix):

\[\Large\rm c=\sqrt{4.7^2+6.1^2-2(4.7)(6.1)\cos47^o}\]

zepdrix (zepdrix):

And then just rely on your good ole calculator from there :)

OpenStudy (anonymous):

i got 4.493796835639

zepdrix (zepdrix):

Yay \c:/ Good job!

OpenStudy (anonymous):

so wait thats still not my answer

zepdrix (zepdrix):

Ohhh the question was areaaaa :( Ahhh sorry.

zepdrix (zepdrix):

\[\Large\rm A=\frac{1}{2}a b \sin(\theta)\]Where theta is the angle BETWEEN sides a and b. \[\Large\rm A=\frac{1}{2}(4.7)(6.1)\sin(47^o)\]

zepdrix (zepdrix):

We didn't need to do the Law of Cosines, my bad :c

OpenStudy (anonymous):

10.483955312708 a

zepdrix (zepdrix):

yay good job \c:/

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