Formules
sin(x+y) = sin(x)cos(y) + cos(x)sin(y)
cos(x+y) = cos(x)cos(y) - sin(x)sin(y)
cos(2x) = 2cos²(x) - 1
sin(2x) = 2sin(x)cos(x)
Formules additions
Equation trigonométrie
cos(x) = cos(a)
x = a (mod 2π)
ou
x = -a (mod 2π)
sin(x) = sin(a)
x = a (mod 2π)
ou
x = π - a (mod 2π)
tan(x) = tan(a)
x = a (mod π)