The inverse cosine function and the inverse sine function are easily understood by anyone who has taken trigonometry. However, some people struggle with the arctangent (or arctan) function and how to use it. If you’re one of those people, this blog post is for you. Read on to find out more about the arctangent and how to use arccosine in your own math calculations. Arctan (also known as reverse tangent or the inverse tangent) is a trigonometric function that finds a number in relation to another value when given an angle. In other words, it tells us how much we need to change our angle in order to double or halve its output. As with many other mathematical functions, there are two different types of Arctangent: Radian Arctangent

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How to Use Arctan in Calculus

When solving for a variable in a calculus equation, the first thing we do is find an expression for that variable that can be manipulated mathematically. Then, we plug that expression into the original equation and substitute it for the variable we’re trying to find. Arctan is especially helpful in trigonometric equations, as it converts an angle’s value into an inverse tangent. This allows us to solve for the trigonometric functions within the equation.

Arctan Equation

The arctan equation is written as follows:

y = tan^{-1}(x)

Arctan and Cosine Together

When we’re trying to solve for the inverse of one trigonometric function, we may want to find the cosine value of another trigonometric function within the same equation. In this case, we can use arctan to find the inverse cosine function and vice versa. Arctan can be used with the cosine function to solve for inverse cosine. This can be helpful when solving trigonometric equations with multiple variables that rely on the inverse cosine and cosine function of each other.

Arccosine Function in Calculus

We can also convert the cosine function into an arccosine function by taking the inverse cosine of the cosine value. We can then plug this into our original equation and solve for the variable that the equation is trying to find.

When solving for a variable in a trigonometric equation, we can use arccosine to find the inverse cosine function, which helps us solve for the other trigonometric functions within the equation.

How to Solve for Arctan Using Calculus

We can use calculus to solve for arctan, which allows us to substitute an arctan expression into an equation. The best way to do this is to use the following steps:

  • Identify the trigonometric functions within the equation – Find the derivative of the equation – Solve for the trigonometric functions in the equation – Use the derivative to find the inverse functions within the solution


Arctan can be used to solve for many different trigonometric functions by using the inverse tangent function. This allows us to simplify many trigonometric equations and find unique solutions to the problems at hand.

However, you should remember that even if you understand how to use arctan in your equations, you shouldn’t overuse it. That is, you should use the inverse tangent function sparingly, as it can sometimes be easier to solve trigonometric equations with other functions.


What is arctan?

Arctan is the inverse of the tangent function.

When do you use arctan?

You can use the arctan to determine an angle measure when the side opposite and the side adjacent to the angle are known.

What is arcsin?

Arcsin is the inverse of the sine function.