Step 4 of 6 Determine all x in [-x/2, x/2] at which the graph has horizontal tangents. To find where the graph has a horizontal tangent, we set f'(x) = 15 cos(x) – 17 sin(x) equal to zero and solve for x. 15 cos(x) - 17 sin(x) = 0 15 = tan(x) 17 15 15 x = arctan 17 -1 tan + nx 17 We must now check for which integer values of n the x-value is in the interval Step 5 of 6 Check that x = tan is the only solution and that this value is in The function f(x) = tan(x) has a domain of all real numbers all real numbers and range Thus x = tan is in the interval Also note that the length of the range is , so integer multiples of x added to the function will push the x-values outside of the interval So this is the only possible solution. Step 6 of 6 Use information from steps 4 and 5 to determine all x in at which the graph has horizontal tangents. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) MacBook Air

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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Step 6
Step 4 of 6
Determine all x in [-x/2, x/2] at which the graph has horizontal tangents.
To find where the graph has a horizontal tangent, we set f'(x) = 15 cos(x) – 17 sin(x) equal to zero and solve
for x.
15 cos(x) - 17 sin(x) = 0
15
= tan(x)
17
15
arctan
17
(15
-1
X =
tan
+ na
17
We must now check for which integer values of n the x-value is in the interval
Step 5 of 6
Check that x = tan
is the only solution and that this value is in
The function f(x) = tan(x) has a domain of all real numbers
all real numbers and range
Thus x = tan
is in the interval
Also note that the length of the
2
range is , so integer multiples of r added to the function will push the x-values outside of the interval
. So this is the only possible solution.
Step 6 of 6
Use information from steps 4 and 5 to determine all x in
at which the graph has horizontal
tangents. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)
MacBook Air
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F1
F2
000
F3
F4
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F7
F8
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4
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6.
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Transcribed Image Text:Step 4 of 6 Determine all x in [-x/2, x/2] at which the graph has horizontal tangents. To find where the graph has a horizontal tangent, we set f'(x) = 15 cos(x) – 17 sin(x) equal to zero and solve for x. 15 cos(x) - 17 sin(x) = 0 15 = tan(x) 17 15 arctan 17 (15 -1 X = tan + na 17 We must now check for which integer values of n the x-value is in the interval Step 5 of 6 Check that x = tan is the only solution and that this value is in The function f(x) = tan(x) has a domain of all real numbers all real numbers and range Thus x = tan is in the interval Also note that the length of the 2 range is , so integer multiples of r added to the function will push the x-values outside of the interval . So this is the only possible solution. Step 6 of 6 Use information from steps 4 and 5 to determine all x in at which the graph has horizontal tangents. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) MacBook Air esc F1 F2 000 F3 F4 ES F7 F8 @ %23 $ & 3 4 5 6. 7 8.
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