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12 terms

math SAT2 trig

STUDY
PLAY
cotangent
cos/sin
tangent
sin/cos
secant
1/cos
cosecant
1/sin
sin(A+B)
sinAcosB + sinBcosA
cos(A+B)
cosAcosB - sinAsinB
tan(A+B)
(tanA + tanB)/(1-tanAtanB)
sin2A
2sinAcosA
cos2A
cos^2(A) - sin^2(A)
1- 2sin^2(A)
2cos^2(A) - 1
tan2A
2tanA/(1-tan^2(A))
Law of cosines
two sides and angle between
c^2 = a^2 + b^2 - 2ab(cosC)
Law of sines
two angles, one side
sinA/A = sinB/B = sinC/C