Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 43)
The angle of elevation from point A to the top of a tower is 30°. The distance from A to the tower's base is 100m. What is the tower's approximate height?
50 m
57.7 m
86.6 m
100 m
説明
Height = 100*tan(30) ≈ 57.7