Math  /  Trigonometry

QuestionOSHA safety regulations require that the base of a ladder be placed 1 ft from the wall for every 4 ft of ladder length. To the nearest tenth of a degree, find the angle that the ladder forms with the ground and the angle that it forms with the wall.

Studdy Solution
Use trigonometric functions to find the angle ϕ\phi that the ladder forms with the wall: - Use the sine function, which relates the opposite side (base) to the hypotenuse:
sin(ϕ)=BaseHypotenuse=L4L=14 \sin(\phi) = \frac{\text{Base}}{\text{Hypotenuse}} = \frac{\frac{L}{4}}{L} = \frac{1}{4}
- Solve for ϕ\phi:
ϕ=sin1(14) \phi = \sin^{-1}\left(\frac{1}{4}\right)
- Calculate ϕ\phi to the nearest tenth of a degree using a calculator:
ϕ14.5 \phi \approx 14.5^\circ
The angle that the ladder forms with the ground is approximately 75.5 \boxed{75.5^\circ} and with the wall is approximately 14.5 \boxed{14.5^\circ} .

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