## How do you know if a line is cos or sin?

# How do you know if a line is cos or sin?

## How do you know if a line is cos or sin?

Comparing Cosine and Sine Functions in a Graph

- Replace cos x with its cofunction identity.
- Apply the two identities for the sine of the sum and difference of two angles. The two identities are.
- Simplify the terms by using the values of the functions. So you see, the shifted sine graph is equal to the cosine graph.

**What is the relationship between sin and cos?**

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 .

### How do you plot cosine?

How to Graph a Cosine Function

- Find the values for domain and range. Like with sine graphs, the domain of cosine is all real numbers, and its range is.
- Calculate the graph’s x-intercepts.
- Calculate the graph’s maximum and minimum points.
- Sketch the graph of the function.

**What is difference between sine and cosine wave?**

Key Difference: Sine and cosine waves are signal waveforms which are identical to each other. The main difference between the two is that cosine wave leads the sine wave by an amount of 90 degrees. It is known as sine wave as it has the similar shape as the sine function, when it is plotted on a graph.

#### What is equivalent to cos a sin a?

The cosine of an angle is defined as the sine of the complementary angle. The complementary angle equals the given angle subtracted from a right angle, 90°. For instance, if the angle is 30°, then its complement is 60°. Generally, for any angle θ, cos θ = sin (90° – θ).

**Are sin and cos equal?**

Sal shows that the sine of any angle is equal to the cosine of its complementary angle.

## What is a cos wave?

A cosine wave is a signal waveform with a shape identical to that of a sine wave , except each point on the cosine wave occurs exactly 1/4 cycle earlier than the corresponding point on the sine wave.