Solution to the Differential Equation tan(x)sin^2(y)dx + cos^2(x)cot(y)dy = 0 | Summary and Q&A

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July 12, 2022
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The Math Sorcerer
Solution to the Differential Equation tan(x)sin^2(y)dx + cos^2(x)cot(y)dy = 0

TL;DR

This video demonstrates the step-by-step process of solving a separable differential equation using sine and cosine functions.

Key Insights

• ❣️ Separable differential equations can be simplified by isolating the x and y variables on separate sides of the equation.
• 👨‍💼 Trigonometric substitutions can be used to rewrite the equation in terms of sine and cosine functions.
• ✊ Integrating the separated equation involves applying the power rule and adding a constant of integration.

Transcript

hi in this video we're going to try to solve this differential equation so this differential equation should be separable what that means is that we should be able to get all of the x's on one side with the dx and all of the y's on one side with the d y so let's go ahead and start by just taking this and subtracting it over this way so we have tang... Read More

Q: What does it mean for a differential equation to be separable?

A separable differential equation is one that can be rearranged to have all the x's on one side with dx, and all the y's on one side with dy. This simplifies the equation for easier solving.

Q: How does the video begin the process of solving the differential equation?

The video starts by subtracting one side of the equation from the other to isolate the terms containing y. This allows for further manipulation to separate the variables.

Q: How does the video handle trigonometric functions in the equation?

The video uses trigonometric identities to rewrite the equation in terms of sine and cosine functions. This simplifies the equation and makes it easier to integrate.

Q: What does the video suggest when unsure of how to integrate the equation?

If the equation doesn't fit any familiar forms for integration, the video recommends going back to sine and cosine functions. This can provide clarity and make the integration process more straightforward.

Summary & Key Takeaways

• The video explains how to simplify a given differential equation to make it separable.

• The process involves rearranging the equation to isolate the x and y variables on separate sides.

• The video then demonstrates how to solve the separated equation using trigonometric functions and integration.