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snow_tiger [21]
3 years ago
15

a ladder leaning against a wall makes an angle of 75 with the ground. If the foot of the ladder is 6 feet from the base of the w

all, what is the length of the ladder

Mathematics
2 answers:
aev [14]3 years ago
7 0
The length of the latter would be 23 feet because we know one angle is 75 and the angle against the wall is 90 and the base is 6 feet answer is 23 feet
34kurt3 years ago
5 0

Answer:

23.18 ft

Step-by-step explanation:

To solve this problem, we make use of the geometry that forms between the wall, the floor and the ladder. A rectangular triangle is formed due to the right angle on the wall, <u>see attached image</u>.

We use the cosine functioncos\theta=\frac{adjacentSide}{hypotenuse}=\frac{a}{h}

Where \theta is the angle, in this case is equal to: \theta =75.

a is the adjacent side to the angle of 75: a=6, and h is the hypotenuse of the triangle that is the length of the ladder, so in the last equation we clear for h

h=\frac{a}{cos\theta}

and substituting known values:

h=\frac{6}{cos(75)}

h=\frac{6}{0.2588}

h=23.18 ft

The length of the ladder is 23.18 ft

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