25
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
-
Z
Z
1
)
<
r
cos
-
5
V
Y
g
P
4
"
)
<
r
tan A = therefore
m
±
A = tan
-1
m
±
A +
m
±
B + 90
¡
= 180
¡
therefore
m
±
B = 90
¡
-
m
±
A
c =
q
< $
$
"
"
<
-
Z Z
7
P
3
"
)
<
7
3
---
7
3
---
⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C
