The sun shines at a 30° angle to the ground. To the nearest inch, how long is the shadow cast by a 72-inch tall fence post?
回答 (2)
2020-04-07 8:54 pm
Refer to the figure below.
In the right Δ:
tan(30°) = 72/x
x = 72/tan(30°)
x = 124.7
Length of the shadow = 124.7 in
In the right Δ:
tan(30°) = 72/x
x = 72/tan(30°)
x = 124.7
Length of the shadow = 124.7 in
2020-04-07 8:37 pm
tan theta = opp/adj
tan 30 = 72/x <<< solve for x
x = 72 tan30 = 41,57 in ~ 42 in
tan 30 = 72/x <<< solve for x
x = 72 tan30 = 41,57 in ~ 42 in
收錄日期: 2021-04-24 07:46:56
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