- #1

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(degrees)

sec(2x+180) = 2 0<x<360

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- #1

- 134

- 1

(degrees)

sec(2x+180) = 2 0<x<360

- #2

Galileo

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Then get rid of the 180 (the 180 causes a shift in the graph of cos(2x)).

- #3

OlderDan

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Changing to cosine is a good idea, but you can't get rid of 180 and get the right answers for x. You could change the cosine to -cos(2x) = 1/2, or set the argument of the cosine as it stands to the values that have cosine = 1/2, then solve for x, keeping only the solutions in the specified interval.Galileo said:

Then get rid of the 180 (the 180 causes a shift in the graph of cos(2x)).

- #4

Galileo

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That's what I meant by 'getting rid of the 180'.OlderDan said:You could change the cosine to -cos(2x) = 1/2

- #5

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Check the range of x:

0 < x < 360

180 < 2x + 180 < 900

0 < x < 360

180 < 2x + 180 < 900

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