Unit Circle / Angles

Reference Angles

100

The reference angle for 105^o

What is 75^o?

200

The reference angle for 345^o

What is 15^o?

300

The reference angle for 

(2pi)/3

What is 

pi/3 ?

400

The reference angle for -150^o

What is 30^o?

500

The reference angle for 

-(7pi)/4

What is 

pi/4

Radians & Degrees

100

270^o in radians

What is 

(3pi)/2

200

pi/2

in degrees

What is 90^o?

300

pi/6

in degrees

What is 30^o?

400

240^o in radians

What is 

(4pi)/3

500

345^o in radians

What is 

(23pi)/12

Sin/Cos/Tan

100

sin 45^o 

(exact values only)

What is 

sqrt2/2 ?

200

tan 45^o

(exact values only)

What is 1?

300

cos 240^o

(exact values only)

What is 

-1/2 ?

400

cos 

(5pi)/3

(exact values only)

What is 

1/2 ?

500

tan 

(7pi)/4

(exact values only)

What is -1 ?

Csc/Sec/Cot

100

csc 30^o

(exact values only)

What is 2?

200

sec 

pi/4

(exact values only)

What is 

sqrt2 ?

300

cot 60^o

(exact values only)

What is 

sqrt3/3 ?

400

csc 300^o

(exact values only)

What is 

-(2sqrt3)/3 ?

500

sec 

(5pi)/4

(exact values only)

What is 

-sqrt2 ?

Miscellaneous

100

sin 180^o

What is 0 ?

200

tan 270^o

What is an undefined value?

300

cot 90^o

What is 0 ?

400

csc 270^o

What is -1 ?

500

sec 270^o

What is an undefined value?