Question
A pole 10 m long rests slantly against a vertical wall
AB making an angle 30° with the horizontal (ground). Find how far the foot of the pole is from the wall (in metres).Solution
A pole 10 m long makes an angle of 30° with the horizontal ground. Using the cosine formula: cos 30° = x/10 x = 10.cos 30° = 10 x √ 3/2 = 5√3 m
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