Texas Instruments TI-30XS User Manual - Page 22

Example Radian Mode, Problem - calculator -

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Example Radian Mode Tan p"

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Copyright © 2006 Texas Instruments Incorporated
22
Example Radian Mode
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:
Tan
p"<- @
gq
4
"E
<
Tan
-1
%\
1
E<
n
Cos
5
V?gq
4
"E
<
n
tan A =
therefore
m
±
A = tan
-1
m
±
A +
m
±
B + 90
Ä
= 180
Ä
therefore
m
±
B = 90
Ä
-
m
±
A
c =
p$$""<
7
3
--
7
3
--
⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C