Trigonometric functions are one of the basic concepts in mathematics.

One of the trigonometric functions is the secant.

He ate one apple.

This math problem requires an understanding of functions.

He calculated the area of the triangle.

This is my first question.

In order to find the inverse function, you need to solve the original function's equation for x and y.

Please find the derivative of this function.

Understanding real variable functions is important for learning the basics of advanced mathematics.

In quantum mechanics, the state of a particle is described by a wavefunction.