Trigonometry

Card Set Information

Author:
Anonymous
ID:
139097
Filename:
Trigonometry
Updated:
2012-03-02 09:08:22
Tags:
Trig
Folders:

Description:
Precalc Trig Tst
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  1. Law of Sines
    a/sin(A)=b/sin(B)=c/sin(C)
  2. When do you use law of cosines?
    Only for SSS or SAS
  3. 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)
  4. 27.4 b
    ----- x -----
    Sin (28.7) Sin (49)

    Set up
    • 27.4
    • ----- x Sin 49
    • Sin 28.6
  5. Set up

    22 12
    ---- x ----
    Sin 42 Sin(B)
    • Sin -1(12 Sin42)
    • --------
    • 22
  6. Law of Cosines--Solve

    493
    ---- = cos(A)
    532
    A=cos-1(493/532)

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