Double Angle Formula Calculator
The double angle formula is a very practical formula in trigonometric functions. It expresses the trigonometric functions of the double angle using the trigonometric functions of the original angle. It can be used to simplify calculation formulas and reduce the number of times trigonometric functions are calculated in calculations. It is also widely used in engineering.
sin(2θ) = 2 x sinθ x cosθ
tan(2θ) = 2 x tanθ / 1 - tan2θ
cos(2θ) = 1 - 2sin2θ