Geometry & Trigonometry
Basic

Secant Definition

Reciprocal of cosine.

Formula

sec⁡θ=1cos⁡θ\sec\theta = \frac{1}{\cos\theta}

Variables

\thetaAngle

Example

sec60°=2

Did You Know?

Secant, cosecant, and cotangent are just the reciprocals of the three familiar ratios, rarely needed but occasionally vital.

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