Q:
# When Does Cos(x) = 0?

**The cosine of x is zero at values π/2, 3π/2, 5π/2, 7π/2 radians, and so on.** Since this is a periodic function, cosine of x equals zero at these intervals on the unit circle, a circle of radius one that lies on the origin of the x-y axis.

The equation of the unit circle is x² + y² = 1. Translating radian values to x-y values requires use of the Pythagorean theorem, where x is the cosine value, and y is the sine value. The radian value π/2 makes a right angle, where the x value is equal to zero, and the y value is equal to one. Cosine is a trigonometric functions and occurs at cyclical intervals along a coordinate axis. Since cosine is cyclical, it will equal zero at regular intervals along the x-y axis and extend until infinity.

Learn more about Algebra-
Q:
## What Steps Are Involved in Linear Programming?

A: Linear programming involves taking a series of linear inequalities, known as the constraints of the system, and determining the optimal values for a system... Full Answer >Filed Under: -
Q:
## What Does Domain Mean in Math?

A: Domain, in math, is defined as the set of all possible values that can be used as input values in a function. A simple mathematical function has a domain o... Full Answer >Filed Under: -
Q:
## What Is a Dependent Variable?

A: In math, a dependent variable is one in an expression, equation or function that depends upon one or more other variables' values to determine its value. T... Full Answer >Filed Under: -
Q:
## What Are Some Examples of Math Expressions?

A: Some examples of mathematical expressions include "mx + y," "5 /a," "20" and "6 - 4." Mathematical expressions are groups of variables, constants and opera... Full Answer >Filed Under: