Q2, integral of cot(x) vs. Integral of csc(x)cot(x) | Summary and Q&A

TL;DR

This content explains how to solve integrals of trigonometric functions, specifically focusing on the derivatives of cosecant and cotangent functions.

Key Insights

• ☺️ Derivative of cosecant X is -cosecant X cotangent X.
• ⌛ Integral of cosecant X times cotangent X is -cosecant X.
• ☺️ Integrating cotangent X involves using a substitution method and results in the natural log absolute value of sine X.
• ❎ Absolute value is important in trigonometric integrals to account for negative values.
• 😄 Using u-substitution simplifies the integral of cotangent X.
• ❓ Trigonometric identities are useful in integrating trigonometric functions.
• 😨 Care must be taken to consider the appropriate constant of integration in the final answer.

Transcript

okay what we took was on a spot and which one do you guys think is easier both of their haptic attention X but this one has the coefficient X right here as well hmm in fact this one it's easier because all we have to do is knowing the fact that derivative of some function it's actually very similar to this and the answer to the following is that we... Read More

Questions & Answers

Q: What is the integral of cosecant X times cotangent X?

The integral of cosecant X times cotangent X is -cosecant X plus C, where C is the constant of integration.

Q: How can the integral of cotangent X be solved?

To find the integral of cotangent X, a substitution method can be used. Let u = sine X, then the integral becomes the natural log absolute value of u plus C, which simplifies to natural log absolute value of sine X plus C.

Q: Why is it important to use absolute value when dealing with trigonometric functions?

Trigonometric functions can have negative values in certain quadrants, so using the absolute value ensures that the result of the integral is always positive.

Q: Can you explain the steps for solving the integral of cotangent X in more detail?

Sure. By substituting u = sine X, we can rewrite the integral as the natural log absolute value of u. Then, differentiating u with respect to X gives us du = cosine X DX, which cancels out the cosine X in the numerator. This allows us to integrate 1/u, resulting in the natural log absolute value of u, which is natural log absolute value of sine X.

Summary & Key Takeaways

• The video discusses the process of finding the integral of the product of cosecant X and cotangent X, which simplifies to -cosecant X.

• The integral of cotangent X is then explored using a substitution method, resulting in the answer of natural log absolute value of sine X.

• It is important to consider the absolute value when dealing with trigonometric functions.