Question
A vertical tower stands on a horizontal plane and is
surmounted by a vertical flag staff of height h. At a point on the plane, the angle of elevation of the bottom of the flag staff is and that of the top of the flag staff is β. Then the height of the tower isSolution
Apply tan 
in ∆BCD Tan = x / K k = (x / tan ) ---- (1) apply tanβ in ∆ACD => tanβ = (ĥ+x) / K => K = (h + x) / (tanβ) ----- (2) Example like (1) and (2) => x / tan = (h+x) / tanβ => xtanβ = tan h + xtan => xtanβ – xtan = h tan => x(tanβ – tan ) = h tan => x = (h tan2) / (tanβ – tan )
Which of the following statements is True ?
I. A joy stick is an input device
II. A plotter is an output device
A _______ is approximately one billion bytes.
System software
Computer programs are also known as
The term "tablet" typically applies to personal computers in what size range?
Which of the following displays icon menu of main options –
A Hard Drive is __________
Daisy wheel is which type of printer?
There is ________ between the files if the same data is stored in different formats in two files or if data must be matched between files.
A ________ is a graphical control element which contains drop – down menus.
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