Teaching Students About the Sech Function


The hyperbolic secant function, often denoted as “sech,” is an essential mathematical tool. It serves as the foundation for numerous applications in physics, engineering, and mathematics. Despite its importance, sech is often overlooked in most high school curriculums. This article will explore the significance of teaching sech to students and provide practical suggestions for educators interested in incorporating this function into their lessons.

What Is Sech?

Sech (pronounced as “seesh”) stands for the hyperbolic secant function. It relates to other hyperbolic functions like sinh (hyperbolic sine), cosh (hyperbolic cosine), and tanh (hyperbolic tangent). The sech function is defined as:

sech(x) = 2 / (e^x + e^(-x))

Unlike its trigonometric counterparts, sech measures areas of a hyperbola rather than angles in a circle.

Why Teach Sech?

Teaching students about sech brings various benefits:

1. Expanding Mathematical Knowledge: Introducing sech helps students develop a well-rounded understanding of mathematics, improving their analytical skills in problem-solving.

2. Real-World Applications:Sech is used extensively in diverse fields like physics (quantum mechanics and statistical mechanics), engineering (wave mechanics), and economics (modeling market curves). Learning about sechs provides students a glimpse of how math underpins various disciplines.

3. Strengthening Other Skills: Understanding sechs contributes to students’ comprehension of calculus since hyperbolic functions are vital components of differential equations and integrals.

Teaching Strategies

Here are several strategies educators can incorporate into their lessons to introduce students to the world of the hyperbolic secant function:

1. Introduce Hyperbolas: Start with the basics by teaching students about hyperbolas, explaining their properties and differences from parabolas and ellipses.

2. Link to Trigonometry: Show students how sechs are related to trigonometric functions, comparing them in terms of formulas and graphical representations.

3. Offer Real-World Examples: Present students with practical examples where sechs are applied in different disciplines like economics, physics, or engineering. This provides context and relevance for learning the function.

4. Use Technology: Leverage graphing calculators or online tools to help students visualize the behavior of the sech function and explore its properties further.


Introducing the sech function to students will enhance their understanding of mathematical concepts and open doors to new applications in various disciplines. By incorporating practical strategies, educators can effectively teach this valuable knowledge in an engaging and accessible manner. Ultimately, teaching students about sechs will broaden their mathematical horizons while showing them the beauty of math across real-world applications.

Choose your Reaction!