Daylight function for 40° N Verify that the function D ( t ) = 2.8 sin ( 2 π 365 ( t − 81 ) ) + 12 has the following properties, where t is measured in days and D is the number of hours between sunrise and sunset. a. It has a period of 365 days. b. Its maximum and minimum values are 14.8 and 9.2, respectively, which occur approximately at t = 172 and t = 355, respectively (corresponding to the solstices). c. D (81) = 12 and D (264) ≈ 12 (corresponding to the equinoxes).
Daylight function for 40° N Verify that the function D ( t ) = 2.8 sin ( 2 π 365 ( t − 81 ) ) + 12 has the following properties, where t is measured in days and D is the number of hours between sunrise and sunset. a. It has a period of 365 days. b. Its maximum and minimum values are 14.8 and 9.2, respectively, which occur approximately at t = 172 and t = 355, respectively (corresponding to the solstices). c. D (81) = 12 and D (264) ≈ 12 (corresponding to the equinoxes).
Solution Summary: The author explains that the day light function has the period of 365 days. The standard form of the sine function is f(theta )=Amathrmsin
Daylight function for 40° N Verify that the function
D
(
t
)
=
2.8
sin
(
2
π
365
(
t
−
81
)
)
+
12
has the following properties, where t is measured in days and D is the number of hours between sunrise and sunset.
a. It has a period of 365 days.
b. Its maximum and minimum values are 14.8 and 9.2, respectively, which occur approximately at t = 172 and t = 355, respectively (corresponding to the solstices).
c.D(81) = 12 and D(264) ≈ 12 (corresponding to the equinoxes).
4. Use method of separation of variable to solve the following wave equation
მłu
J²u
subject to
u(0,t) =0, for t> 0,
u(л,t) = 0, for t> 0,
=
t> 0,
at²
ax²'
u(x, 0) = 0,
0.01 x,
ut(x, 0) =
Π
0.01 (π-x),
0
Solve the following heat equation by method of separation variables:
ди
=
at
subject to
u(0,t) =0, for
-16024
ძx2 •
t>0, 0 0,
ux (4,t) = 0, for
t> 0,
u(x, 0) =
(x-3,
\-1,
0 < x ≤2
2≤ x ≤ 4.
ex
5.
important aspects.
Graph f(x)=lnx. Be sure to make your graph big enough to easily read (use the space given.) Label all
6
33
Chapter 1 Solutions
Calculus: Single Variable, Early Transcendentals and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition) (Briggs, Cochran, Gillett & Schulz, Calculus Series)
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