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| PAGE: 447 | SET: Exercises | PROBLEM: 69 |
The function 
hours.
Find the number of hours of daylight in Houston,Texas North latitude of Texas (
North lattitude).
Convert latitude from seconds to normal degree representation angle.
.
(a)
Summer solstice (
).
Find 
.
Substitute the values 
and 
in above function.
Convert angle from degrees to radians.
.
The function hours.
Substitute the value 
in above function.
.
(b)
Vernal equinox (
).
Calculate 
.
Substitute the values 
and in above equation.
Convert angle from degrees to radians.
The function hours.
Substitute the value 
in above function.
.
(c)
July 4( 
).
Calculate
Substitute 
and
Convert angle from degrees to radians
The function hours.
Substitute 
in day above function.
.
(a) 
.
(b) 
.
(c) 
.
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