• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

The Programming Expert

Solving All of Your Programming Headaches

  • HTML
  • JavaScript
  • jQuery
  • PHP
  • Python
  • SAS
  • Ruby
  • About
You are here: Home / PHP / php acos – Find Arccosine and Inverse Cosine of Number

php acos – Find Arccosine and Inverse Cosine of Number

January 27, 2022 Leave a Comment

To find the arccosine, or inverse cosine, of a number, we can use the php acos() function.

acos(x)

In php, we can easily use trigonometric functions from the collection of php math functions. These php math functions allow us to perform trigonometry easily.

To find the arccosine of a number, we use the php acos() function.

Below is the php syntax to find the inverse cosine of a number.

acos(x)

The input to the acos() function must be a float between -1 and 1. The return value will be a float between 0 and pi radians.

echo acos(0.5); // 1.0471975511965979
echo acos(0); // 1.5707963267948966
echo acos(-0.75); // 2.4188584057763776

Finding the Inverse Cosine of a Number in php

Arccosine is defined as the inverse of the cosine of a number.

Below, we show that if we pass a number to cos() and then call the php acos() function, we get back the same number.

echo acos(cos(pi()/3)); // 1.0471975511965976
echo pi()/3; // 1.0471975511965976

Hopefully this article has been beneficial for you to understand how to use the acos() function in php to find the arccosine of a number.

Other Articles You'll Also Like:

  • 1.  Replace Underscore with Space in php String
  • 2.  Get Query String from URL in php
  • 3.  php array_filter() – Filter Array Elements with Function in php
  • 4.  php Square Root with sqrt Function
  • 5.  php cosh – Find Hyperbolic Cosine of Number Using php cosh() Function
  • 6.  How to Get Current System IP Address in php
  • 7.  PHP random_int() Function – Generate Random Integers in PHP
  • 8.  php print_r() Function- Get Information about Variables in php
  • 9.  Check if String Starts with Given String in php with str_starts_with()
  • 10.  php array_combine() – Create New Array Given Arrays of Keys and Values

About The Programming Expert

The Programming Expert is a compilation of a programmer’s findings in the world of software development, website creation, and automation of processes.

Programming allows us to create amazing applications which make our work more efficient, repeatable and accurate.

At the end of the day, we want to be able to just push a button and let the code do it’s magic.

You can read more about us on our about page.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

About The Programming Expert

the programming expert main image

Welcome to The Programming Expert. We are a group of US-based programming professionals who have helped companies build, maintain, and improve everything from simple websites to large-scale projects.

We built The Programming Expert to help you solve your programming problems with useful coding methods and functions in various programming languages.

Search

Learn Coding from Experts on Udemy

Looking to boost your skills and learn how to become a programming expert?

Check out the links below to view Udemy courses for learning to program in the following languages:

Copyright © 2023 · The Programming Expert · About · Privacy Policy