Math Check 2 ?s quick
posted by Jake .
The angle of elevation to the top of a 20story skyscraper is measured to be 10 from a point on the ground 1,500 feet from the building. Find the height of the skyscraper in feet, correct to three decimal places.
(Points : 5)
260.47
73.86
972.54
264.49 <
Let f(x) = sin1x. Then the domain of f(x) is [1,1] and the range is all real numbers.
(Points : 5)
True
False <

first question is correct
#2 should be true.
sin^1 (x) means find the angle Ø so that sinØ = x
since the result of taking the sine is always a number between 1 and +1
then for sin^2 (x) , your choice of x has to be 1 ≤ x ≤ 1
e.g try taking sin^1 (1.4) on your calculator
that is
2nd
sin
1.4
=
you should get an "error" result 
Thank you so much!
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