Trigonometry
Advanced

Half Angle: Tangent

Tangent of half an angle.

Formula

tan⁡θ2=1−cos⁡θsin⁡θ\tan\frac{\theta}{2} = \frac{1-\cos\theta}{\sin\theta}

Variables

\thetaAngle

Did You Know?

The tangent half-angle appears in the Mercator map projection that guided centuries of sea navigation.

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