Calculate sin(2θ), cos(2θ), or tan(2θ) using double angle formulas.
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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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