Calculus 2 : Derivatives of Polar Form

Study concepts, example questions & explanations for Calculus 2

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Example Questions

Example Question #11 : Derivatives Of Polar Form

Find the derivative of the following function:

 

Possible Answers:

Correct answer:

Explanation:

The derivative of a polar function is given by

First, we must find the derivative of the function, r:

We used the following rules to find the derivative:

Now, plug in the derivative and the original function r into the above formula:

Example Question #12 : Derivatives Of Polar Form

Find the derivative of the following function:

Possible Answers:

Correct answer:

Explanation:

The derivative (slope of the tangent line) of a polar function is given by the following formula:

So, we must simply find  and plug it into the above formula:

The following rules were used to find the derivative:

Now, plug the given function and its derivative into the above formula to get our answer:

Example Question #31 : Parametric, Polar, And Vector Functions

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of  with respect to  as follows:

 

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

Using the trigonometric identity , we can deduce that . Swapping this into the denominator, we get:

Example Question #13 : Derivatives Of Polar Form

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of  with respect to  as follows:

 

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

 

Using the trigonometric identity , we can simplify the denominator to be 

Example Question #4 : Derivatives Of Parametric, Polar, And Vector Functions

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to  as follows:

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

 

Using the trigonometric identity , we can deduce that . Swapping this into the denominator, we get:

Example Question #11 : Derivatives Of Polar Form

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to  as follows:

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

Using the trigonometric identity , we can deduce that . Swapping this into the numerator, we get:

Example Question #15 : Derivatives Of Polar Form

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to as follows:

We can then swap the given values of and into the equation of the derivative of an expression into polar form:

Example Question #16 : Derivatives Of Polar Form

What is the derivative of ?

 

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to as follows:

We can then swap the given values of and into the equation of the derivative of an expression into polar form:

 

Using the trigonometric identity , we can deduce that . Swapping this into the denominator, we get:

Example Question #11 : Derivatives Of Polar Form

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to  as follows:

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

Using the trigonometric identity , we can deduce that . Swapping this into the denominator, we get:

Example Question #18 : Derivatives Of Polar Form

What is the derivative of ?

Possible Answers:

Correct answer:

Explanation:

In order to find the derivative   of a polar equation , we must first find the derivative of with respect to  as follows:

We can then swap the given values of  and  into the equation of the derivative of an expression into polar form:

Using the trigonometric identity , we can deduce that . Swapping this into the denominator, we get:

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