Trig 2
Terms
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- cscθ =
- 1/sinθ
- tanθ =
- sinθ/cosθ
- cotθ =
- 1/tanθ OR cosθ/sinθ
- secθ =
- 1/cosθ
- sin^2θ + cos^2θ =
- 1
- 1 + tan^2θ =
- sec^2θ
- 1 + cot^2θ =
- csc^2θ
- sin(-θ) =
- -sinθ
- cos(-θ) =
- cosθ
- tan(-θ) =
- -tanθ
- sin(Ϭ/2 - θ)
- cosθ
- cos(Ϭ/2 - θ)
- sinθ
- tan(Ϭ/2 - θ)
- cotθ
- sin A/a = sin B/b =
- sin C/c
- a^2 = b^2 + ...
- c^2 - 2bc cosA
- b^2 = a^2 + c^2 ...
- - 2ac cosB
- c^2 = a^2 + b^2 ...
- - 2ab cosC
- sin(x+y) =
- sinxcosy + cosxsiny
- sin(x-y) =
- sinxcosy - cosxsiny
- cos(x+y) =
- cosxcosy - sinxsiny
- cos(x-y) =
- cosxcosy + sinxsiny
- tan(x+y) =
- tanx + tany/1 - tanxtany
- tan(x-y) =
- tanx - tany/1 + tanxtany
-
sin2x =
(Double Angle Formula) -
2sinxcosx
(Double Angle Formula) - cos2x =
-
cos^2x - sin^2x
OR
2cos^2x - 1
OR
1 - 2sin^2x - tan2x =
- 2tanx/1 - tan^2x
- sin^2x =
- 1 - cos2x/2
- cos^2x =
- 1 + cos2x/2