### All AP Calculus BC Resources

## Example Questions

### Example Question #1 : Polar Form

Rewrite in polar form:

**Possible Answers:**

**Correct answer:**

### Example Question #2 : Polar Form

What is the following coordinate in polar form?

Provide the angle in degrees.

**Possible Answers:**

**Correct answer:**

To calculate the polar coordinate, use

However, keep track of the angle here. 68 degree is the mathematical equivalent of the expression, but we know the point (-2,-5) is in the 3rd quadrant, so we have to add 180 to it to get 248.

Some calculators might already have provided you with the correct answer.

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### Example Question #3 : Polar Form

What is the equation in polar form?

**Possible Answers:**

**Correct answer:**

We can convert from rectangular form to polar form by using the following identities: and . Given , then .

. Dividing both sides by ,

### Example Question #4 : Polar Form

What is the equation in polar form?

**Possible Answers:**

None of the above

**Correct answer:**

We can convert from rectangular form to polar form by using the following identities: and . Given , then . Multiplying both sides by ,

### Example Question #5 : Polar Form

Convert the following function into polar form:

**Possible Answers:**

**Correct answer:**

The following formulas were used to convert the function from polar to Cartestian coordinates:

Note that the last formula is a manipulation of a trignometric identity.

Simply replace these with x and y in the original function.

### Example Question #6 : Polar Form

What is the equation in polar form?

**Possible Answers:**

**Correct answer:**

We can convert from rectangular to polar form by using the following trigonometric identities: and . Given , then:

Dividing both sides by , we get:

### Example Question #7 : Polar Form

What is the polar form of ?

**Possible Answers:**

**Correct answer:**

We can convert from rectangular to polar form by using the following trigonometric identities: and . Given , then:

Dividing both sides by , we get:

### Example Question #8 : Polar Form

What is the polar form of ?

**Possible Answers:**

None of the above

**Correct answer:**

We can convert from rectangular to polar form by using the following trigonometric identities: and . Given , then:

### Example Question #9 : Polar Form

What is the polar form of ?

**Possible Answers:**

None of the above

**Correct answer:**

Dividing both sides by , we get:

### Example Question #10 : Polar Form

What is the polar form of ?

**Possible Answers:**

None of the above

**Correct answer:**