Calculate sin(2θ), cos(2θ), or tan(2θ) using double angle formulas.
Calculate sin(2θ), cos(2θ), or tan(2θ) using double angle formulas.
The base angle θ.
Double angle formulas express trig functions of 2θ in terms of functions of θ: sin(2θ)=2sinθcosθ, cos(2θ)=cos²θ−sin²θ, tan(2θ)=2tanθ/(1−tan²θ).
How this calculator works
Double angle formulas express trig functions of 2θ in terms of functions of θ: sin(2θ)=2sinθcosθ, cos(2θ)=cos²θ−sin²θ, tan(2θ)=2tanθ/(1−tan²θ).
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