manual

26
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
-1
%B 6
1 E <
Cos 5 V %B 2
60 E <
Tan q " < -
%B 3 g P 4 " E
<
Tan
-1
%B 6
1 E <
r
Cos 5 V %B 2 g P 4
" E <
tan A = therefore m
±A = tan
-1
m
±A + m±B + 90Ä = 180Ä
therefore m
±B = 90Ä - m±A
c =
7
3
---
7
3
---
⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C