The angle of elevation θ of the sun in the sky at any latitude L is calculated with the formula sinθ=cosDcosLcosω+sinDsinL.   ω is the number of radians that the Earth has rotated through since noon when ω=0. D is the declination of the sun. Westville has latitude L=37.9°.   Find the angle of elevation θ in degrees of the sun at 3 PM on February​ 29, 2012, where at that time D≈−0.1425

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Question

The angle of elevation

θ

of the sun in the sky at any latitude L is calculated with the formula

sinθ=cosDcosLcosω+sinDsinL.  
ω

is the number of radians that the Earth has rotated through since noon when

ω=0.

D is the declination of the sun. Westville has latitude

L=37.9°.  

Find the angle of elevation

θ

in degrees of the sun at 3 PM on February​ 29, 2012, where at that time

D≈−0.1425

and 

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