Trig Review/Vocab

Angle Vocab

100

What is the endpoint of the rays in an angle called?

Vertex

200

Where is the vertex in standard position?

on (0,0)

300

Where is the initial side in standard position?

on the positive x-axis

400

Positive angles are measured in which direction? (give the word or draw a picture)

counterclockwise

500

Negative angles are measured in which direction (picture or word)?

clockwise direction

Radians

100

How many radians are in a full revolution?

2pi

200

pi/3

is in what quadrant?

Quadrant I

300

Acute angles are between ____ and ____ radians

0 and 

pi/2

400

Obtuse angles are between ____ and ____ radians

pi/2

 and 

pi

500

Supplementary angles add to ____ radians

pi

Degrees/convert

100

Complementary angles add up to ___ degrees

90

200

How many degrees are in a full rotation?

360 degrees

300

Converting from degrees to radians multiply by _____

pi/180

400

Converting from radians to degrees multiply by _____

180/pi

500

convert

(8pi)/3

 to degrees

480 degrees

Reference Angles

100

A reference angle is measured from what two parts?

Terminal side and x-axis

200

What is the reference angle for 150 degrees?

30 degrees

300

What is the reference angle for - 285 degrees?

75 degrees

400

What is the reference angle for -11pi/6?

pi/6

500

What is the reference angle for 5pi/9?

4pi/9

Coterminal

100

Give a negative coterminal angle with 60^o

-300^o

200

Give a positive coterminal angle with -250 degrees

110 degrees

300

Give a positive coterminal angle with 3pi/5

13pi/5

400

Give a negative coterminal angle with 13pi/6

-11pi/6

500

Give a positive coterminal angle with -15pi/2

pi/2