A ladder 9m long leans against a vertical wall, making an angle of 64° with the horizontal ground. calculate correct to one decimal place, how far the foot of the ladder is from the wall.
a
4.0m
b
5.8m
c
7.1m
d
8.1m
e
18.5m
Explanation
Correct Option
a
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Rich Rap
9 years ago
The selected answer is wrong:
when it come to right angle triangle with a given angle, the side across it is the opposite, based on SOHCAHTOA the answer is
sine64'=x/9
0.8989=x/9
cross multiply
x=9X0.8989
x=8.1m
