Pre-Calculus, 9th edition
69

 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) .

TESTIMONIALS
 "I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett "Your site is amazing! It helped me get through Algebra." Charles "My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease
 Tweets by @mathskeydotcom

QUESTIONS? LET US HELP.