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Need Help in Proving Trig Identities

  1. May 14, 2008 #1
    Hi all

    Teacher gave me homework that i am having trouble doing it ..

    i need help in these two problems which i can't seem to solve.

    how can i prove the following :

    @= theta

    sec@ + tan@ = tan@sec@
    cot@ + cos@


    sin^2@ - tan@= tan^2@
    COS^2@ - cot@

    my try is in the attach file

    Attached Files:

    Last edited: May 14, 2008
  2. jcsd
  3. May 14, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    Well, what have you tried? You must show some work before we can help you. What happened to the homework posting template in which one is supposed to write one's attempts?
  4. May 14, 2008 #3


    i have done my other homework problems but except these two. as i stated i can't solve. Due to the fact i don't know where to start. i do know my Fundamental identities.
  5. May 14, 2008 #4
    ok here this is what i tried after what u have said

    Attached Files:

    Last edited: May 14, 2008
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