P012
Trigonometry
Lesson 1: Radian Measure
Radians are a unit different than degrees for measuring angles.
1 Radian is the measure of the central angle that contains an are that is the same
length as the radius.
211' radians =3
w
v
To change from degrees

PC12
Trigonometry
Lesson 4: The Unit Circle
The Special Triangles: m
if
306090 Triangle [E and
A
454590 Triangle Unit Circle: a circle with a radius of 1
( I Examgle 1: Use the unit circle to determine the exact values for:
a)cossE='&=-L

PC12
Trigonometry
Lesson 2: An les in Standard Position
Let P(x, y) be a point rotating about the circumference of a circle centered at
0(0. 0) with radius r. P starts at the point AM
(f s 0
An angle is said to be in standard position if the initial arm

PC11
Trigonometry
Lesson 8: Phase Shift
How is the graph of the function y = si_n[6£] related to y = sin 6?
10(x-75 2
rij r;f%
How is the graph of the function y = sin[6+§] related to y = sin 6?
In General: The graph of y = sin(9 t) or y = 1305(61) is the

PC12
Trigonometry
Lesson 5: Reciprocal Trigonometric Ratios
Cosecant:
Secant:
Cotangent:
Example 1: The point P (3, -5) is on the terminal arm of angle 6 in standard position.
Draw a diagram showing 8 in standard position and nd the six trig ratios
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