Recent content by seastick

  1. S

    How can I prove the trig identity sinxcosxsec^2x = tanx?

    Many thanks for your help
  2. S

    How can I prove the trig identity sinxcosxsec^2x = tanx?

    [b]1. How do I prove sinxcosxsec^2x=tanx Homework Equations sec^2x = tan^2x + 1 The Attempt at a Solution sinxcosx(tan^2x + 1) tan^2xsinxcosx +sinxcosx sin^2x/cos^2x*sinxcosx + sinxcosx - is this valid? I'm not sure what I've done is even correct - but it doesn't seem...