Double Angle Cosine Calculator
Posted by Dinesh onOnline geometry calculator to calculate double angle cosine (related to the cosine and the sine) for trigonometric identities.
Trigonometric identities are equalities that involve trigonometric functions and are true for every single value of the occurring variables. Geometrically, these are identities involving certain functions of one or more angles. They are called this because they involve trigonometric functions of double angles, i.e. sin 2A, cos 2A and tan 2A.