Posted by Jake on Tuesday, January 14, 2014 at 10:45pm.
The angle of elevation to the top of a 20-story 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)
Let f(x) = sin-1x. Then the domain of f(x) is [-1,1] and the range is all real numbers.
(Points : 5)
- Math Check 2 ?s quick - Reiny, Tuesday, January 14, 2014 at 11:01pm
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
you should get an "error" result
- Math Check 2 ?s quick - Jill, Tuesday, January 14, 2014 at 11:14pm
Thank you so much!
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