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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 Z1 ) <
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 < $ $ " " <
- ZZ 7 P 3 " ) <
7
3
---
7
3
---
⎠
⎞
⎝
⎛
3
2
7
2
+
c
B
A
3
7
C
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