TMUA Practice Question — Worked Solution

P1·Trigonometry·6.5Mock 0 · P1 · Q18

3-D trigonometryangles of elevationcosine rulePythagorasmedian relation

Three points

A

B

and

C

lie in that order on a straight road across horizontal ground, with

A B = B C = 100

m. A vertical mast stands on the same ground. The angles of elevation of the top of the mast from

A

B

and

C

are

3 0^{\circ}

4 5^{\circ}

and

6 0^{\circ}

respectively.What is the height of the mast, in metres?

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