micahmereus100
30.11.2019 •
Mathematics
A20 foot ladder is lean against a building. the foot of the ladder is 6 feet from the building. find the
angle the ladder makes with the building.
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Ответ:
cos(theta) = 6/20
cos(theta) = 0.3
Use the inverse cos or cos^-1 on your calculator to get the angle
theta = 72.5
Ответ:
Given:
The set is
To find:
Whether the given set is empty or not.
Solution:
A set is called empty set if it has no elements.
We have,
We need to find the solutions of and . The common solutions of these two equations are the elements of given set.
...(i)
And,
...(ii)
From (i) and (ii) it is clear that, there is no common value of x which satisfy both equations and .
Since there is no element in set A, therefore, the given get A is an empty set.