Review of Trig Chart and Reference Angles

30 degrees (pi/6)
sin 1/2
cos squareroot 3/2
sec 2 squareroot 3/2
csc 2
tan squareroot 3/3
cot squareroot 3

45 degrees (pi/4)
sin squareroot 2/2
cos squareroot 2/2
sec squareroot 2
scs squareroot 2
tan 1
cot 1

60 degrees (pi/3)
sin squareroot 3/2
cos 1/2
sec 2
csc 2 squareroot 3/2
tan squareroot 3
cot squareroot 3/3

90 degrees (pi/2)
sin 1
cos 0
sec undefined
csc 1
tan undefined
cot 0

o degrees
sin o
cos 1
sec 1
csc undefined
tan 0
cot undefined

Example 1.) find a reference angle for sin 560.
Sin 560= Sin 20

Example 2.) what is sin 30 degrees?
Sin 30 degrees=1/2