Education Technology

The Calculator App

How do I calculate secant, cosecant, cotangent?

The TI-84 Evo calculator does not have built-in secant, cosecant and cotangent trigonometric functions. To compute these trigonometric functions, use the properties listed below.

  • \( \operatorname{csc}(x) = \frac{1}{\sin(x)} = (\sin(x))^{-1} \)
  • \( \operatorname{sec}(x) = \frac{1}{\cos(x)} = (\cos(x))^{-1} \)
  • \( \operatorname{cot}(x) = \frac{1}{\tan(x)} = (\tan(x))^{-1} \)

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