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The Law of Cosines (idea)
See all of The Law of Cosines
, there is 1 more in this node.
(
idea
)
by
zark
Sat Nov 13 1999 at 9:49:29
The Law of Cosines is used to help find the angles and sides of a
triangle
, through the use of ratios.
cos C = (a
2
+b
2
-c
2
)/(2ab)
another form:
c
2
= a
2
+b
2
-2ab(cos C)
The Law of Sines
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