SOLUTION: How can you find the asymptotes of cotangent, cosecant, and secant problems? Is there are formula? Please help me! 1. What are the asymptotes of {{{g(x)= cot(0.5x)}}} 2. What

Algebra ->  Trigonometry-basics -> SOLUTION: How can you find the asymptotes of cotangent, cosecant, and secant problems? Is there are formula? Please help me! 1. What are the asymptotes of {{{g(x)= cot(0.5x)}}} 2. What       Log On


   



Question 196162: How can you find the asymptotes of cotangent, cosecant, and secant problems?
Is there are formula? Please help me!
1. What are the asymptotes of g%28x%29=+cot%280.5x%29
2. What are the asymptotes of g%28x%29+=+sec%282x%29
3. What are the asymptotes of g%28x%29+=+%281%2F2%29csc%28x%29

Answer by Edwin McCravy(20059) About Me  (Show Source):
You can put this solution on YOUR website!

There are infinitely many asymptotes for each of
these.

Rules:

To find asymptotes for 

        Tangent and secant graphs

Set the argument (what the tangent or secant is of)
equal to %282n%2B1%29%2Api%2F2 and solve for x.

Then let n = any integer, positive, negative, or zero.

        Cotangent and cosecant graphs

Set the argument (what the cotangent or cosecant is of)
equal to n%2Api and solve for x.

Then let n = any integer, positive, negative, or zero.

[Note: the asymptotes are not affected by a coefficient
in front of the trig function]

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1. What are the asymptotes of g%28x%29=+cot%280.5x%29

This is a cotangent graph, so set

0.5x+=+n%2Api

Remove the decimal by multiplying both sides by 10

5x+=+10n%2Api

x+=+%2810n%2Api%29%2F5

x+=+2n%2Api  

Let n = -3, -2, -1, 0, 1, 2, 3

x+=+2%28-3%29%2Api,x+=+2%28-2%29%2Api, x+=+2%28-1%29%2Api,x+=+2%280%29%2Api, x+=+2%281%29%2Api, x+=+2%282%29%2Api, x+=+2%283%29%2Api, etc., etc.,

This becomes:

x+=+-6pi,x+=+-4pi, x+=+-2pi,x+=+0, x+=+2pi, x+=+4pi, x+=+6pi, etc., etc.,

These are all asymptotes.

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2. What are the asymptotes of g%28x%29+=+sec%282x%29

This is a secant graph, so set

2x+=+%282n%2B1%29%2Api%2F2

x+=+%28%282n%2B1%29%2Api%2F2%29%2F2

x+=+%282n%2B1%29%2Api%2F2%7D%2A%281%2F2%29

x+=+%282n%2B1%29%2Api%2F4

  Let n = -3, -2, -1, 0, 1, 2, 3

x+=+%282%28-3%29%2B1%29%2Api%2F4,x+=+%282%28-2%29%2B1%29%2Api%2F4,x+=+%282%28-1%29%2B1%29%2Api%2F4,x+=+%282%280%29%2B1%29%2Api%2F4,x+=+%282%281%29%2B1%29%2Api%2F4,x+=+%282%282%29%2B1%29%2Api%2F4,x+=+%282%283%29%2B1%29%2Api%2F4

This becomes:

x+=+-5pi%2F4,x+=+-3pi%2F4, x+=+-pi%2F4,x+=+pi%2F4, x+=+3pi%2F4, x+=+5pi%2F4, x+=+7pi%2F4, etc., etc.,

These are all asymptotes.

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3. What are the asymptotes of g%28x%29+=+%281%2F2%29csc%28x%29

Note: The 1%2F2 in front does not affect the asymptotes,

This is a cosecant graph, so set

x+=+n%2Api

Let n = -3, -2, -1, 0, 1, 2, 3

x+=+-3pi,x+=+-2pi, x+=+-pi,x+=+0, x+=+pi, x+=+2pi, x = 3pi, etc., etc.,

These are all asymptotes.

Edwin