Geometry and TrigonometryHardHorizontal distance from a slant length
Geometry and Trigonometry practice question
A 20-metre cable runs from the top of a mast to the ground, making an angle of 60° with the ground. How far, in metres, is the cable's ground anchor from the base of the mast?
Answer: 10
20 cos 60° = 20 × 1/2 = 10.
Common wrong answers
- If you answered 40
- 40 divides by cos 60°.
- If you answered 17.3
- 17.3 uses sin 60°, the mast's height.
- If you answered 34.6
- 34.6 uses tan 60°.
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