getThirdSideLength function

double getThirdSideLength(
  1. double a,
  2. double b,
  3. double angle
)

get third angle or side length in a triangle

Implementation

double getThirdSideLength(double a, double b, double angle) {
  double c2 = a * a + b * b - 2 * a * b * cos(angle);
  return sqrt(c2);
}