Precalculus Intro to the Unit Circle Lesson Slides: 3 Slides

3 Slides • 7 Questions

1

PC - Unit Circle Intro 02/19/21

2

Directions:

Watch the following video and take notes, then answer the questions that follow.

3

4

Multiple Choice

What is the radius of the unit circle?

1

0

2

1

3

1/2

4

√2/2

5

Multiple Choice

What are the 3 basic trig functions?

1

Sine, cosine, and cotangent

2

Sine, cotangent, and cosecant

3

Sine, cosine, and tangent

4

Cosecant, cosine, and cotangent

6

Multiple Choice

sinθ is positive in

1

the 1st and 2nd quadrants

2

the 1st and 3rd quadrants

3

the 1st and 4th quadrants

4

the 2nd and 3rd quadrants

7

Multiple Choice

cosθ is positive in

1

the 1st and 2nd quadrants

2

the 1st and 3rd quadrants

3

the 1st and 4th quadrants

4

the 2nd and 3rd quadrants

8

Multiple Choice

If I wanted to find the sine of an angle, what side lengths would I need to know?

1

base, hypotenuse

2

hypotenuse, adjacent

3

opposite, hypotenuse

4

adjacent, opposite

9

Multiple Choice

The cosine of an angle can be calculated by which expression?

1

$\frac{hypotenuse}{adjacent}$

2

$\frac{opposite}{adjacent}$

3

$\frac{adjacent}{hypotenuse}$

4

$\frac{adjacent}{opposite}$

10

Multiple Select

$\tan\left(\theta\right)$ of an angle, $\theta$ can be expressed as which of the following?

1

$\frac{opposite}{hypotenuse}$

2

$\frac{opposite}{adjacent}$

3

$\frac{\sin\left(\theta\right)}{\cos\left(\theta\right)}$

4

$\frac{hypotenuse}{adjacent}$

PC - Unit Circle Intro 02/19/21

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