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Stolb23 [73]
3 years ago
13

a 320-foot tree casts a 130-foot shadow on horizontal ground. a girl lying on the grass at the tip of the shadow is looking at a

bird nesting at the top of the tree. at what angle is the girl looking up? assume that the tree grows at a right angle to the ground g

Physics
1 answer:
mixer [17]3 years ago
7 0

Answer:\theta =67.88^{\circ}

Explanation:

Given

Height of tree is H=320 ft

length of shadow L=130 ft

let \theta be the angle of elevation

using trigonometric relation

\tan \theta =\frac{H}{L}

\tan \theta =\frac{320}{130}

\theta =tan^{-1}(2.461)

\theta =67.88^{\circ}

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