Texas Instruments TI-30XS - Manual (Page 22)

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"<- @
gq4 "E <
Tan
-1 %\1 E<
n
Cos 5 V?gq4 "E
<
n
tan A = therefore m ± A = tan
-1
m ± A + m ± B + 90Д = 180Д
therefore m ± B = 90Ä - m ± A
c =
p$$""<
7
3
--
7
3
--⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C