Trigonometry
Cosine Function - Trigonometry
Learn the cosine function with examples, step-by-step guide, and calculator tools. Calculate the cosine of an angle in a right triangle
The cosine function is a fundamental concept in trigonometry. Calculate the cosine of an angle in a right triangle. This page provides a comprehensive guide with worked examples and practical applications.
The Formula
\[\cos(\theta) = \frac{\text{adjacent}}{\text{hypotenuse}}\]
Variables
cos(θ)
Cosine of angle
θ
Angle in radians
adjacent
Length of adjacent side
hypotenuse
Length of hypotenuse
Step-by-Step Guide
- 1
Step 1: Gather your data values
- 2
Step 2: Apply the formula
- 3
Step 3: Perform the calculations
- 4
Step 4: Interpret the result
Examples
Example 1
Example 1: [] → cos(60°) = cos(π/3) = 0.5
Example 2
Example 2: 0.5
Frequently Asked Questions
What is the cosine function?
Calculate the cosine of an angle in a right triangle
How do I calculate cosine function?
Use the formula: \cos(\theta) = \frac{\text{adjacent}}{\text{hypotenuse}}. Follow the steps provided above.
What tools can help with cosine function?
We provide online calculators: calculator