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    jake beggs's Avatar
    jake beggs Posts: 5, Reputation: 1
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    #1

    Dec 8, 2008, 09:42 PM
    solving for all the possible trigonometric answers
    I'm doing a home made study sheet for an exam this week and I've hit a snag on one of my problems.

    tan(X)+sec(X)=1

    I can get to

    (sin(X)+1)/(cos(X))=1

    can anyone help with the next step?

    help is much appreciated...
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Dec 9, 2008, 10:18 AM

    Bring the cosine to the right hand side:

    sin(x) + 1 = cos(x)

    Now, considering the behavior of the sine and cosine functions, can you tell us at what point(s) cosine(x) is 1 greater than sin(x)? I suggest drawing a graph of cosine and sine, and you should then get the answer.
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