brainy51
26.07.2020 •
Mathematics
Deriving the Law of Cosines
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Follow these steps to derive the law of cosines.
1. The relationship between the side lengths in AABD is
2 = x2 +h? by the
B.
a
h
х
А
D
b-x
С
b
Check
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Ответ:
c=chocolate
A.
4v+c=45
v+c=27
b.
multiply 2nd equation by -1 and add to first
4v+c=45
-v-c=-27 +
3v+0c=18
3v=18
divide both sides by 3
v=6
sub bac
v+c=27
6+c=27
minus 6
c=21
21chocolate
6 vanila
I used elimnation because it's easeir