Texas Instruments ti-30xs Manual Do Utilizador
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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:
Reminder:
Tan
p"<- @
gq4 "E <
gq4 "E <
Tan
-1
%\1
E<
n
Cos
5 V?gq4 "E
<
<
n
tan A = therefore m
±
A = tan
-1
m
±
A + m
±
B + 90Ä = 180Ä
therefore m
±
B = 90Ä - m
±
A
c =
p$$""<
7
3
3
--
7
3
3
--⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C