Using Reference Angles to Evaluate Trig Functions
Degree Measure of the Angle: 390°
Reference Angle: _________
sin 390° = _________
cos 390° = __________
tan 390° = __________
csc 390° = _________
sec 390° = __________
cot 390° = __________
tan " =
=
Using Reference Angles to Evaluate Trig Functions
Degree Measure of the Angle: -240°
Reference Angle: _________
sin -240° = _________
cos -240° = __________
tan -240° = __________
csc -240° = _________
sec -240° = __________
cot -240° = __________
Using Reference Angles to Evaluate Trig Functions
Use reference angles to evaluate the following trigonometric
functions.
a.) cos (315°)
b.) cos (-210°)
c.) csc (-240°)
d.) tan (210°)
e.) sec (780°)
f.) sin (225°)
g.) cos (-225°)
h.) tan (-120°)
i.) csc (-225°)
j.) cos (270°)
k.) sec (-90°)
l.) csc (180°)