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Conversions between radians and degrees

100

90 degrees to radians 

PI/2

200

150 degrees to radians 

5PI/6

300

30 degrees to radians 

 PI/6

400

3PI/2 radians to degrees 

270 degrees 

500

7PI/4 radians to degrees

315 degrees 

Identitities

100

sin=1/csc

reciprocal identities 

200

cos=1/sec

reciprocal

300

sin/cos=tan

Quotient Identities 

400

sin²+cos²=1

Pythagorean Identities 

500

sin(-A)=sinA

Opposite-Angle identities 

trig values of angles

100

sin270

-1

200

cos(120)

-1/2

300

sin(90

1

400

tan(135

-1

500

csc(150

ROOT 2 

Find a trig value given a trig value

100

Sin =1/2 find cos 

cos=1/2

200

sin = 3/5 find cos

cos=4/5

300

cos=12/13 find sin 

sin=5/13

400

sin=5/13 find sec

sec 13/12

500

tan= 5/12 find sin

sin=5/13

find the angle given a trig

100

cos x=1/2

x=30

200

sin x=1/2

x=30

300

cos x=0

x=90

400

sin x= 0

x=0

500

sin x=-1

x=270