A ladder 13 m long leans against a wall. The foot of the ladder is parallel along the ground away from the wall, at the rate 1.5 m>s. a. How fast does the upper end move when the foot of the ladder is 12 m away from the wall? b. How fast does the angle between the ladder and the ground change when the foot of the ladder is 12 m away from the wall?
Ratios
A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.
Trigonometric Ratios
Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.
A ladder 13 m long leans against a wall. The foot
of the ladder is parallel along the ground away from the wall, at
the rate 1.5 m>s.
a. How fast does the upper end move when the foot of the ladder
is 12 m away from the wall?
b. How fast does the angle between the ladder and the ground
change when the foot of the ladder is 12 m away from the wall?
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