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kymber

  • 3 years ago

The angle of elevation of a ladder leaning against a wall is 72°. If the ladder is 20 feet long, how far is the base of the ladder from the wall? I got 19.02, is that right? (Pleeeeease be right ಠ෴ಠ)

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  1. ZhangYan
    • 3 years ago
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    cos72 = x/20 20cos72 = x 20(0.309) = x x = 6.18 ft

  2. robtobey
    • 3 years ago
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    \[20\text{ Cos}[72{}^{\circ}]=5 \left(-1+\sqrt{5}\right)=6.2 \text{ feet}\]

  3. kymber
    • 3 years ago
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    Waha. Thaanks

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