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Math Help - Trig Identities

  1. #1
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    Trig Identities

    Could anyone help on this trig identity? I have a quiz tomorrow and am unsure on this one.

    (1/tanx-secx)+(1/tanx+secx)= -2 tanx

    Any help is appreciated!
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  2. #2
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    Make a common denominator on the LHS of the equation.

    What do you get?
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  3. #3
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    Quote Originally Posted by pickslides View Post
    Make a common denominator on the LHS of the equation.

    What do you get?
    Can you walk me through this?

    Here is what I got (didn't place any x's for visual purposes):

    (tan+sec)/(tan^2-sec^2) + (tan-sec)/(tan^2-sec^2)

    simplified that further to:

    (tan+sec+tan-sec)/(tan^2-sec^2)

    simplified even more to get:

    (2tan)/(tan^2-sec^2)

    Now I'm stuck. can you heLp?
    thanks
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  4. #4
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    WAIT!!!!

    (tan^2-sec^2) simplifies to 2tan / -1

    which is equal to -2tan!!!

    thanks for startin me off
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