From two points x and y, 8m apart, and in line with a pole, the angle of elevation of the top of the pole are 30o and 60o respectively. Fins the height of t...

Assessment: JAMB UTME - Mathematics - 1987 Subject: General Mathematics

Question 1 Report

From two points x and y, 8m apart, and in line with a pole, the angle of elevation of the top of the pole are 30o and 60o respectively. Fins the height of the pole assuming that x, y and the foot of the pole are the same horizontal plane and x and y are on the same side of the pole.

\sqrt{6}

\sqrt{3}

√3

\frac{12}{\sqrt{3}}

Answer Details

From the diagram, WYZ = 60o, XYW = 180o - 60o
= 120o
LX = 30o
XWY = 180o - 120o + 30o
XWY = 30o
WXY = XYW = 30o
Side XY = YW
YW = 8m, sin 60o = $\frac{3}{2}$
? sin 60o = $\frac{h}{Y W}$ , sin 60o = $\frac{h}{8}$
h = 8 x $\frac{3}{2}$
= 4 $\sqrt{3}$

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From two points x and y, 8m apart, and in line with a pole, the angle of elevation of the top of the pole are 30o and 60o respectively. Fins the height of t...

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