Trigonometry
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Law of Sines
a/sin(A)=b/sin(B)=c/sin(C)
When do you use law of cosines?
Only for SSS or SAS
Law of Cosines
a^2=b^2+c^2-2bc(cos)(A)
b^2=a^2+c^2-2accos(B)
c^2=a^2+b^2-2abcos(C)
27.4 b
----- x -----
Sin (28.7) Sin (49)
Set up
27.4
----- x Sin 49
Sin 28.6
Set up
22 12
---- x ----
Sin 42 Sin(B)
Sin -1(12 Sin42)
--------
22
Law of Cosines--Solve
493
---- = cos(A)
532
A=cos-1(493/532)
Card Set Information
Author:
Anonymous
ID:
139097
Filename:
Trigonometry
Updated:
2012-03-02 14:08:22
Tags:
Trig
Folders:
Description:
Precalc Trig Tst
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