Show:
Radians and Degrees
Unit Circle
Miscellaneous
Converting between Standard and General
Circle Equations
100

what is π/6 converted to degrees?

30º

100

What is the maximum value of sin and cos

What is 1

100

What is a radian?

An angle formed by an arc of a circle the same length as the RADIUS

100
Find the center and radius of the given equation. -4x+x2+y2-4y=1
What is (2,2) radius=3
100
Identify the center and radius of the following circle: (x+2)2 + (y+9)2 = 9
What is (-2,-9) radius=3
200

What is 210º converted to radians?

7/6π

200

What two quadrants is tangent positive?

One and Three

200

What is the equation for finding the reference angle in Quadrant II?

180 - angle

200
Find the center and radius of the given equation. x2+12x-6y+y2=-36
What is (-6,3) radius=3
200

Find the center and radius of the given equation. (x-2)^2+(y+1)^2=16

What is (2,-1) radius=4

300

What is 5π/4 converted to degrees?

225º

300

What are the coordinates of 120o?

300

What is the radius of the Unit Circle?

1 Unit

300
Find the center and radius of the given equation. 8x+x2-2y=64-y2
What is center (-4,1) radius: 9
300
Write the standard equation of the circle with center (2,16) and Area =π
What is (x-2)2 + (y-16)2 = 1
400

What is 5π/3 converted to degrees?

300º

400

What quadrant is cosine positive and sine is negative?

4

400

A Circle is located at center C and contains a point A. Does point P lie inside, outside, or on the circle? Show the work for each distance to get full credit!

C=(3,2)

A= ( 4,4)

P=(1,4)

\bar{CA}= sqrt(5)

\bar{CP}= sqrt(8)

P is outside the circle​​​​​​​​
400
Find the center and radius of the given equation. x2+2x+y2+8y-47=0
What is (-1,-4) radius=8
400

Write the standard equation of the circle with center (-9,3) and point (-5,8)

What is (x+9)2 + (y-3)2 = 41

500

Arrange in order from least to greatest: cos(0º), sin(π/4), cos(120º), sin(2π/3)

sin(2π/3) < cos(120º) < sin(π/4) < cos(0º)

500

Which angle in Quadrant II has a sine value of 1/2?

150o or  (5pi)/6 

500

What is the equation for finding the reference angle in Quadrant III and IV? (Two answers for full credit!)

III = angle - 180

IV = 360 - angle

500
Find the center and radius of the given equation. 4x+x2+y2-6y-9=0
What is (-2, 3) radius=&rad;22
500
Write the standard equation of the circle with diameter endpoints of (0,7) and (-4,-15)
What is (x+2)2 + (y+4)2 = 125