Trigonometryhard · Past Paper
A ladder leans against a wall at 60. If the foot is pulled 2 m, it makes 30. Ladder length?
A2(√3+1) m
B4 m
C2√3 m
D1 m
✓ Correct Answer: A — 2(√3+1) m
L cos 30 - L cos 60 = 2. L(√3/2 - 1/2) = 2. L(√3-1) = 4. L = 4/(√3-1) = 2(√3+1).
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