Cosine Double Angle Identity
Calculate the cosine of twice a given angle using double angle identity formula. Enter the α value and get the cosine double angle function value easily.
Cosine Double Angle Identity Calculator
Cosine Double Angle Identity Formula :
cos (2α)
= cos2(α) - sin2(α)
Double angle identity calculators can be used where trigonometric expressions are need to be simplified. Also, double angle identity formulas and respective calculators are provided for sine and tangent trig functions.