© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
12
Trig Functions
Name ___________________________
Date
___________________________
Problems
1. Find the trigonometric ratios for the triangle. Round to the nearest
hundredth. (Use
%
‚
for rounding.)
a. sin
C
_______________________
b. cos
C
_______________________
c. tan
C
_______________________
d. sin
A
_______________________
e. cos
A
_______________________
f. tan
A
_______________________
2. Using the TI-30X
Ù
S, find the value of each ratio. Round to the nearest ten
thousandth.
a. sin 71º
_______________________
b. tan 31º
_______________________
c. cos 25º
_______________________
3. Using the TI-30X
Ù
S, find the measure of each angle. Round to the nearest
degree.
a. sin
B
= 0.4567
_______________________
b. cos
A
=0.6758
_______________________
c. tan
C
= 5.83
_______________________
5
4
3
B
C
A