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# Trig Exam 3

Addition Formulas sin(x+y)= sinxcosy + cosxsiny sin(x-y)= sinxcosy - cosxsiny cos(x+y)= cosxcosy - sinxsiny cos(x-y)= cosxcosy + sinxsiny
Double Angle Formulas sin2x= 2sinxcosx cos2x= cos^2x - sin^2x = 1-2sin^2x = 2cos^2x - 1 tan2x= 2tanx/1-tanx = sin2x/cos2x
Half Angle Formulas sinx/2= sq. root (1-cosx/2) cosx/2= sq. root (1+cosx/2) tanx/2= sinx/1+cosx = sinx/2 / cosx/2
Domains of the Trig Functions sin [-pi/2, pi/2] cos [0, pi] tan [-pi/2, pi/2]
Ranges of the Trig Functions sin [-1, 1] cos [-1, 1] tan (-infinity, infinity)
Domains of the Inverse Trig Functions sin [-1, 1] cos [-1, 1] tan (-infinity, infinity)
Ranges of the Inverse Trig Functions sin [-pi/2, pi/2] cos [0, pi] tan [-pi/2, pi/2]
Law of Sines sinA/a = sinB/b = sinC/c
Law of Cosines a^2 = b^2 + c^2 - 2bc(cosA)
Area of triangle 1/2 ab sinx
Created by: gaudiop