Find the angle of elevation of sun at different times as at 9.00 am, 2.00 pm and 5.00pm. For this project you need a stick about 100 cm long . At the given times you put the stick vertical and measure its length of shadow. Then using tanx = length of stick/ length of shadow . find the value of x using trigonometric table given in your maths book at the end.
Answers
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Given : A stick of 100 cm
To Find : angle of elevation of sun at different times as at 9.00 am, 2.00 pm and 5.00pm.
Solution:
This is an practical experiment
Result will vary depending upon location where it is being performed
ad day on which this performed
At 9 : 00 AM - Shadow length approx 100 cm
tanx = length of stick/ length of shadow
Tan x = 100/100
=> Tanx = 1
=> x = 45°
At 2 : 00 PM - Shadow length approx 60 cm
Tan x = 100/60
=> Tanx = 5/3
=> x = 59°
At 5 : 00 PM - Shadow length approx 60 cm
Tan x = 100/170
=> Tanx =10/17
=> x = 30.5°
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