According to History Today, William Jones created pi in 1706. This mathematics teacher used the symbol to refer to the constant ratio of any circle's circumference to its diameter. More »

Pi Day is a nationally recognized date celebrating mathematics and the history of the mathematical term pi. Pi Day is observed and celebrated in many fun ways worldwide. More »

Some mathematical problems that feature pi are the area of a circle, a circle's circumference, arc length and the different surface area and volume formulas for a cone, sphere and cylinder. In mathematics, the ratio betw... More »

Pi is not a rational number. It is considered irrational. A rational number is able to be written as a fraction with integers for both the numerator and denominator. More »

The number Pi, symbolized by a Greek letter, has a constant value that approximately equals 3.14159. Pi is an irrational number, which means it cannot be expressed as a common fraction, and it has an infinite decimal rep... More »

Precalculus is used in various fields like chemistry, biology and economics in the real world. It is used to make mathematical models or calculations for getting an optimal answer. More »

The derivative of tan(2x) is equal to two times the secant squared of two times x. Using mathematical notation, the equation is written as d/dx tan(2x) = 2sec^2(2x). More »