Ch 2 Review

Cofunction ID

100

sin 60^o = 

cos 30^o

200

cos 72^o =

sin 18^o

300

sec 20^o =

csc 70^o

400

tan x^o =

cot (90 - x)^o

500

csc (20 - x)^o =

sec (70 + x)^o

Reference Angles

100

theta = 50^o

Find the reference angle

50^o

200

theta = 135^o

Find the reference angle

45^o

300

theta = 210^o

Find the reference angle

30^o

400

theta = 525^o

Find the reference angle

15^o

500

theta = 1420^o

Find the reference angle

20^o

Exact Angles

100

cos 30^o =

sqrt3 / 2

200

sin 45^o =

sqrt2 / 2

300

tan 60^o =

sqrt3 

400

sec 30^o =

2sqrt3 / 3

500

cot 90^o =

0

Right Triangle Trig

100

Find sin B

4/5

200

Find tan B

2/3

300

Find sec B

29/20

400

Find cos B

sqrt39 / 8

500

Find cot B

sqrt3

Calculator

100

round to 4 places

tan 75^o =

3.7321

200

sin B = .6157   find angle B

38^o

300

round to 4 places 

csc 23^o =

2.5593

400

sec B = 2.2812  Find angle B

64^o 

500

cot B = 3.7321  Find angle B

15^o