Find dy/dx by Substituting r for y and Theta for x | Simple Implicit Problem

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In summary, the conversation discusses finding the derivative of the function r=x^2 tan(2x) by substituting r for y and theta for x. The attempt at a solution involves using the product and chain rules, but the final result is incorrect.
  • #1
Minihoudini
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Homework Statement


substituting r for y and theta for x as it will be easier to read

find dy/dx if r=x^2 tan(2x)

I don't know the answer

Homework Equations





The Attempt at a Solution



d/dx (y) = d/dx [x^2 tan(2x)]

dy/dx = dx/dx [2x] d/dx [tan (2x)]

dy/dx = 2x sec^2 (2x) (2)

dy/dx = 4x sec^2 (2x)

its wrong though
 
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  • #2
Minihoudini said:

Homework Statement


substituting r for y and theta for x as it will be easier to read

find dy/dx if r=x^2 tan(2x)

I don't know the answer

Homework Equations





The Attempt at a Solution



d/dx (y) = d/dx [x^2 tan(2x)]

dy/dx = dx/dx [2x] d/dx [tan (2x)]
The line above is wrong. x^2 * tan(2x) is a product, so you need to use the product rule. You are using the chain rule correctly, below.
Minihoudini said:
dy/dx = 2x sec^2 (2x) (2)

dy/dx = 4x sec^2 (2x)

its wrong though
 

FAQ: Find dy/dx by Substituting r for y and Theta for x | Simple Implicit Problem

What is a simple implicit problem?

A simple implicit problem refers to a type of mathematical problem where the solution is not explicitly stated, but rather implied or hidden within the problem itself.

How do you solve a simple implicit problem?

To solve a simple implicit problem, you must first identify the implicit element or unknown variable, and then use mathematical operations and equations to manipulate the given information and solve for the unknown variable.

What are some examples of simple implicit problems?

Examples of simple implicit problems include finding the slope of a line given two points, solving for the radius of a circle given its circumference, and determining the value of a variable in an algebraic equation.

What is the difference between a simple implicit problem and an explicit problem?

The main difference between a simple implicit problem and an explicit problem is that in an explicit problem, the solution is stated directly and can be easily identified, whereas in an implicit problem, the solution is not directly stated and must be inferred or calculated using additional information.

How are simple implicit problems used in real-world applications?

Simple implicit problems are used in various fields such as mathematics, physics, and engineering to solve complex problems and model real-world situations. They are also used in data analysis and optimization problems.

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