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Double Angle Identity Solver, Formula - Trig Calculator

Double Angle Trig Identity solver is used to solve the expression of trigonometric functions of angles equal to 2θ in terms of θ based on the trig identity formula.

Double Angle Trig Identity

  • Enter θ angle in degree:

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Result

  • Double Angle Trig Identity:

Formula Used:

 sin(2θ) = 2 x sinθ x cosθ
 cos(2θ) = 1 - 2sin2θ
 tan(2θ) = 2 x tanθ / 1 - tan2θ

Double Angle Trig Identities are especially useful in finding the values of unknown trigonometric functions from the derived formulas.