Trigonometry L1-4Definitions of

1
Trigonometry L1-4 Definitions of
Trigonometric Functions

r

y
?

x
2
Ex1. Find the six trig functions for the angle
whose terminal side passes through (4,-2).
4
?
-2
r
42 (-2)2 r2
3
Ex2. Find the six trig functions for the angle
? that terminates in QIII and sin? -2/3.

?
-x
(-2)2 x2 32

-2
3


4
Ex3. Find the six trig functions for the angle
? 135.
Reference angle is 45
in Q2






Ex4. Find the six trig functions for the angle
? 270.


5
Ex5. Evaluate tan30sin60 sin180