SOLUTION: Analyze the function f(x) = sec 2x. Include:
- Domain and range
- Period and Amplitude
- Two Vertical Asymptotes
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Question 1014764: Analyze the function f(x) = sec 2x. Include:
- Domain and range
- Period and Amplitude
- Two Vertical Asymptotes
Answer by ikleyn(52873) (Show Source): You can put this solution on YOUR website!
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Analyze the function f(x) = sec 2x. Include:
- Domain and range
- Period and Amplitude
- Two Vertical Asymptotes
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f(x) = sec(2x) = .
The domain is all number line (all real numbers) except those where cos(2x) = 0.
These exceptional values are 2x = , k = 0, =/-1, +/-2, . . .
In other words, the exceptional values for x are , k = 0, =/-1, +/-2, . . .
The range is the union of two infinite intervals: y <= -1 and y >=1.
The period is the same as for the function cos(2x), i.e. .
There is no amplitude. The conception/notion of an amplitude is not applicable to the function y = sec(2x).
Vertical asymptotes are there where cos(2x) = 0, i.e. at the points , k = 0, =/-1, +/-2, . . . - the same exceptional points mentioned above.
Plot of the function y = sec(2x) is shown below.
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