# What does a cosine function look like on a graph?

## What does a cosine function look like on a graph?

To graph the cosine function, we mark the angle along the horizontal x axis, and for each angle, we put the cosine of that angle on the vertical y-axis. The result, as seen above, is a smooth curve that varies from +1 to -1. It is the same shape as the cosine function but displaced to the left 90°.

## Where do cos graphs start?

A standard cosine starts at the highest value, and this graph starts at the lowest value, so we need to incorporate a vertical reflection.

**What does cos look like?**

Sine and cosine — a.k.a., sin(θ) and cos(θ) — are functions revealing the shape of a right triangle. Looking out from a vertex with angle θ, sin(θ) is the ratio of the opposite side to the hypotenuse , while cos(θ) is the ratio of the adjacent side to the hypotenuse .

**What is cosine curve?**

Definition of cosine curve : a curve whose equation in Cartesian coordinates is of the form y = a cos x.

### Where does a cosine graph start?

### What is the cosine equation?

Let us consider a right-angled triangle with one of its acute angles to be x. Then the cosine formula is, cos x = (adjacent side) / (hypotenuse), where “adjacent side” is the side adjacent to the angle x, and “hypotenuse” is the longest side (the side opposite to the right angle) of the triangle.

**How do you draw a sin graph?**

Graphing the Basic Equations. Draw a coordinate plane. For a sine or cosine graph, simply go from 0 to 2π on the x-axis, and -1 to 1 on the y-axis, intersecting at the origin (0, 0). repeat the same shape from negative infinity to positive infinity on the x-axis (you’ll generally only graph a portion of it).

**Why does the COS graph start at 0 1?**

What is f(x)? The function starts at its maximum value (ie, f(0)= VSCALE ), so what kind of function is it? The cosine function, \cos(x) , starts at 1 (ie, \cos(0)=1 ), so f(x) must be a scaled version of the cosine function. The function starts at zero (ie, f(0)=0 ), so what kind of function is it?