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Nanarie

can someone explain to me how to solve (cosx/1-sinx) - (cosx/1+sinx)? The answer is supposed to be 2tanx.
Sep 05 2012 04:20 PM
  • Junsu's Photo
    Junsu
    1. Use the difference of squares for both parts in the parenthesis.
    2. Now, as the bottom are the same, combine the two parts.
    3. Use your trig identity function on the bottom.
    4. Tell me if you still don't get it.
    Sep 05 2012 04:27 PM
  • Nanarie's Photo
    Nanarie
    thanks guys ;~; so far i got to (1+sinx)/cosx - (1-sinx)/cosx but now i don't know how to go from there.
    Sep 05 2012 04:37 PM
  • Nanarie's Photo
    Nanarie
    WAIT OMG I GOT IT omg i am like in tears T_T thank you both for your help
    Sep 05 2012 04:44 PM
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