# First order DE initial value

• Eastonc2
In summary, a first order differential equation is an equation involving a function and its first derivative, typically written as dy/dx = f(x). An initial value is a known value of the dependent variable y at a specific value of the independent variable x, denoted as y0 or y(x0). Initial values are important in solving first order differential equations as they provide the starting point for finding the solution. To solve a first order differential equation with initial values, methods such as separation of variables, integrating factors, or method of undetermined coefficients can be used. These methods utilize the initial values to find the particular solution. First order differential equations with initial values have many real-life applications in science, engineering, economics, epidemiology, ecology,

#### Eastonc2

The problem:

dx(1-y^2)^1/2=dy(1-x^2)^1/2

y(0)=3^(1/2)/2

My attempt:

I separated the variables and integrated, and came up with

sin^-1(x)+c=sin^-1(y)

This is where i am stuck. any suggestions? did I run astray anywhere?

You seem to be on the right track. Now given the initial value, plug in 0 for x and 3^(1/2)/2 for y and solve for C. You should take it from there.

## What is a first order differential equation?

A first order differential equation is an equation that involves a function and its first derivative. It is typically written in the form dy/dx = f(x), where y is the dependent variable and x is the independent variable.

## What is an initial value?

An initial value is a known value of the dependent variable y at a specific value of the independent variable x. It is typically denoted as y0 or y(x0), where x0 is the initial value of x.

## What is the importance of initial values in first order differential equations?

Initial values are crucial in solving first order differential equations because they provide the starting point for finding the solution. They help to determine the particular solution of the equation, as the general solution of a first order differential equation typically contains a constant of integration.

## How do you solve a first order differential equation with initial values?

To solve a first order differential equation with initial values, you can use various methods such as separation of variables, integrating factors, or the method of undetermined coefficients. These methods involve using the initial values to find the particular solution of the equation.

## What are some real-life applications of first order differential equations with initial values?

First order differential equations with initial values are used in many fields of science, engineering, and economics to model and predict various phenomena. Examples include population growth, chemical reactions, radioactive decay, and electrical circuits. They are also used in fields such as epidemiology, ecology, and finance to make predictions and inform decision-making.