Trigonometrymedium · Past Paper
A bridge over a river makes an angle of 45° with the river bank. If the length of the bridge across the river is 150 m, find the width of the river.
A75√2 m
B150 m
C150√2 m
D75 m
✓ Correct Answer: A — 75√2 m
sin 45 = width / 150. 1/√2 = w / 150. w = 150/√2 = 75√2 m.
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