Find the length of the longest straight line that lies entirely within the surface: This will from A(r = 2,0 = 50°, ) = 20°) to B(r= 4,0 = 30°, ø = 60°) or A(x: = 2 sin 50° cos20°, y = 2 sin50° sin20°, z = 2 cos 50°) to B(x = 4sin 30° cos60°, y = 4sin 30° sin 60°, z = 4 cos 30°) or finally A(1.44, 0.52, 1.29) to B(1.00, 1.73, 3.46). Thus B – A = (-0.44, 1.21, 2.18) and Length = |B – A| = 2.53
Find the length of the longest straight line that lies entirely within the surface: This will from A(r = 2,0 = 50°, ) = 20°) to B(r= 4,0 = 30°, ø = 60°) or A(x: = 2 sin 50° cos20°, y = 2 sin50° sin20°, z = 2 cos 50°) to B(x = 4sin 30° cos60°, y = 4sin 30° sin 60°, z = 4 cos 30°) or finally A(1.44, 0.52, 1.29) to B(1.00, 1.73, 3.46). Thus B – A = (-0.44, 1.21, 2.18) and Length = |B – A| = 2.53
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Rate of Change
The relation between two quantities which displays how much greater one quantity is than another is called ratio.
Slope
The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as:
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please explain the solution of branch (d)

Transcribed Image Text:The surfaces r =
2 and 4, 0 = 30° and 50°, and = 20° and 60° identify a closed surface.
a) Find the enclosed volume: This will be
r60°
r50°
Vol =
p2 sin Odrdod = 2.91
20°
30°
where degrees have been converted to radians.
b) Find the total area of the enclosing surface:
r60°
r(sin 30° + sin 50°)drdo
20°
r60°
50°
-" |"
(4² +22)sin Od0dø +
Area =
20°
J30°
50°
+2
rdrde = 12.61
30°
c) Find the total length of the twelve edges of the surface:
r50°
Langth – 1 dr
= 4
dr + 2
(4+2)d0+
(4sin50° + 4sin 30° + 2 sin 50° + 2 sin 30°)do
2
30°
20°
= 17.49
d) Find the length of the longest straight line that lies entirely within the surface: This will be
from A(r = 2,0 = 50°, 6 = 20°) to B(r= 4,0 = 30°, o = 60°) or
A(x
= 2 sin 50° cos20°, y = 2 sin50° sin20°, z = 2 cos 50°)
to
B(x = 4sin 30° cos60°, y = 4sin 30° sin 60° , z = 4 cos 30°)
or finally A(1.44,0.52, 1.29) to B(1.00, 1.73, 3.46). Thus B- A = (-0.44, 1.21, 2.18) and
Length = |B – A| = 2.53
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