Math Check 2 ?s quick

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)
260.47

73.86

972.54

264.49 <--

Let f(x) = sin-1x. Then the domain of f(x) is [-1,1] and the range is all real numbers.
(Points : 5)
True

False <--

  1. 👍 0
  2. 👎 0
  3. 👁 206
asked by Jake
  1. 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

    1. 👍 0
    2. 👎 0
    posted by Reiny
  2. Thank you so much!

    1. 👍 0
    2. 👎 0
    posted by Jill

Respond to this Question

First Name

Your Response

Similar Questions

  1. geometry

    A tourist is standing in the center of a roof 1000 feet skyscraper wants to a photo of the top of the adjacent skyscraoer that is 1500 feet tall what is the angle of elevation from the tourist to the top of the skyscraper to

    asked by sheila on February 22, 2017
  2. MATH TRIG

    FROM A DISTANCE OF 80 M. THE ANGLE OF ELEVATION OF THE TOP OF A FLAGPOLE IS 18 DEGREES. dETERMINE THE HEIGHT OF THE FLAGPOLE.(NEAREST TETH OF A M. mY CONFUSION IS ANGLE OF DEPRESSION AND ANGLE OF ELEVATION. mY TECHER CALLS FROM

    asked by JASON on May 13, 2009
  3. physics

    A superhero is running toward a skyscraper to stop a villain from getting away. As he is moving, he looks up at the top of the building and his line of sight makes a 33.0° angle with the ground. After having moved 300 m, he looks

    asked by jaime on August 9, 2014
  4. trigonometry

    a man measured the angle of elevation of the top of a tower to be 70 degree. When he walked 300 m. further, the angle of elevation of the top was 35 degree. What is the height of the tower?

    asked by eekim on July 12, 2011
  5. Geometry

    If you stand at stree level, the angle of elevation to a buildings tenth-story window is great than the angle of elevation to one of its ninth-story windows.

    asked by zach on April 24, 2012
  6. trigo

    to calculate the height of the tower david measured the angle of elevation of the top of the tower from point A to B 42degrees. He moved then 30meter closer to the tower and from the point B the angle of elevation to the top of

    asked by love on January 12, 2016
  7. Pre-Calculus

    1.The angle of elevation to top of a building from a point on the ground 20degrees and the angle of elevation from a point to 25 feet farther away is 12degrees. Find the height of the building. 2.From a point on the ground, the

    asked by Jay on January 13, 2011
  8. Math

    1. A rangers tower is located 44m from a tall tree. From the top of the tower, the angle of elevation to the top of the tree is 28 degrees and the angle of depression to the base is 36 degrees. How tall is the tree? 2. An engineer

    asked by Tsunayoshi on February 6, 2014
  9. maths

    from a certain spot, the top of a triangle had an angle of elevation of 40 degree. move 15meter in a straight line towards the flag pole.Now to the top has an angle of elevation of 60degree.Find the height of the flagpole and it's

    asked by basit on May 26, 2016
  10. Trig

    From a point A on the ground, the angle of elevation to the top of a tall building is 24.1 degrees. From a point B, which is 600 ft closer to the building, the angle of elevation is measured to be 30.2 degrees. Find the height of

    asked by Jennifer on November 11, 2009

More Similar Questions