Texas Instruments TI-30XS Multiview User Manual page 22

Example Radian Mode
Tan
-1
Tan
Cos
³ Problem
Find angle A of the right triangle below. Then calculate angle
B and the length of the hypotenuse c. Lengths are in meters.
Round results to one decimal place.
Reminder:
7
tan A = therefore m
- -
3
m A + m
± ±
therefore m
±
2
c = 3 7
+
p$$""<
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p"<- @
gq4 "E <
%\1 E<
n
5 V?gq4 "E
<
n
A = tan
±
B + 90Ä = 180Ä
B = 90Ä - m
2
7
⎛ ⎞
-1
- -
⎝ ⎠
3
A
A
±
3
C
c
B
7
22