### All Calculus 2 Resources

## Example Questions

### Example Question #1 : Derivatives Of Parametric, Polar, And Vector Functions

Find the derivative of the following set of parametric equations:

**Possible Answers:**

**Correct answer:**

We start by taking the derivative of x and y with respect to t, as both of the equations are only in terms of this variable:

The problem asks us to find the derivative of the parametric equations, dy/dx, and we can see from the work below that the dt term is cancelled when we divide dy/dt by dx/dt, leaving us with dy/dx:

So now that we know dx/dt and dy/dt, all we must do to find the derivative of our parametric equations is divide dy/dt by dx/dt:

### Example Question #1 : Derivatives Of Parametrics

Solve:

**Possible Answers:**

**Correct answer:**

The integration involves breaking up a power of a trigonometric ratio, and then using known trigonometric identities.

The alternative is to find which answer choice has a derivative equal to the answer choice, and for this we get:

### Example Question #1 : Derivatives Of Parametrics

Solve for if and .

**Possible Answers:**

**Correct answer:**

Write the the formula to solve for the derivative of parametric functions.

Find and using the power rule .

Substitute back to the formula to obtain the derivative.

### Example Question #1 : Derivatives Of Parametrics

Find the derivative of the following parametric function:

**Possible Answers:**

**Correct answer:**

The derivative of a parametric function is given by:

where

,

The derivatives were found using the following rules:

Simply divide the derivatives as shown above.

### Example Question #1 : Derivatives Of Parametrics

Solve for if and .

**Possible Answers:**

None of the above

**Correct answer:**

Given equations for and in terms of , we can find the derivative of parametric equations as follows:

, as the terms will cancel out.

Using the Power Rule

for all and given and ,

and .

Therefore,

.

### Example Question #6 : Derivatives Of Parametrics

Find the derivative of the following parametric equation:

**Possible Answers:**

**Correct answer:**

The derivative of a parametric equation is given by the following equation:

Solving for the derivative of the equation for y, you get

and for the equation for x, you get

The following rules were used for the derivatives:

,

### Example Question #2 : Derivatives Of Parametrics

Find if and .

**Possible Answers:**

**Correct answer:**

Write the formula to find the derivative for parametric equations.

Substitute the knowns into the formula.

### Example Question #1 : Derivatives Of Parametrics

Solve for if and .

**Possible Answers:**

**Correct answer:**

We can determine that since the terms will cancel out in the division process.

Since and , we can use the Power Rule

for all to derive

and .

Thus:

.

### Example Question #9 : Derivatives Of Parametrics

Solve for if and .

**Possible Answers:**

None of the above

**Correct answer:**

We can determine that since the terms will cancel out in the division process.

Since and , we can use the Power Rule

for all to derive

and .

Thus:

.

### Example Question #2 : Derivatives Of Parametrics

Solve for if and .

**Possible Answers:**

None of the above

**Correct answer:**

We can determine that since the terms will cancel out in the division process.

Since and , we can use the Power Rule

for all to derive

and .

Thus:

.

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