You should also know the basic trigonometric identities below, the values of the trigonometric functions at all of the standard angles, and, of course, the properties of the logarithm and exponential functions.
- tan(x) = sin(x)/cos(x)
- sec(x) = 1/cos(x)
- cot(x) = cos(x)/sin(x)
- csc(x) = 1/sin(x)
- sin2(x) + cos2(x) = 1
- 1+tan2(x) = sec2(x)
- sin2(x) = (1-cos(2x))/2
- cos2(x) = (1+cos(2x))/2