Name:________________________________
Degrees Radians
Reference
angle
1
0⁰
0⁰
2
30⁰
30⁰
3
45⁰
45⁰
4
60⁰
60⁰
5
90⁰
6
120⁰
7
135⁰
8
150⁰
9
180⁰
10
210⁰
11
225⁰
12
240⁰
13
270⁰
14
300⁰
15
315⁰
16
330⁰
17
360⁰
Trigonometric Functions and Ref. angles
Sin
Cos
tan
Csc=
𝟏
𝑺𝒊𝒏
Geometry Pd____
Sec=
𝟏
𝑪𝒐𝒔
Cot=
𝟏
𝒕𝒂𝒏
90⁰
30⁰
30⁰
SOH-CAH-TOA; Sin=
𝑶𝒑𝒑
𝑯𝒚𝒑
, Cos =
𝑨𝒅𝒋
𝑯𝒚𝒑
, and Tan =
𝑶𝒑𝒑
𝑨𝒅𝒋
Reference angle is from 0⁰ to 90⁰, use the +ve or –ve x-axis as your initial axis. Reference angle is always
positive.
All {Quadrant 1}  Students {Quadrant 2}  Take {Quadrant 3}  Calculus {Quadrant 4}
All +ve in {QI}
 Sin +ve in {QII}
Created by: Kinza 2014
 Tan +ve in {QIII}
 Cos +ve in {QIV}