Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

Trig identity help!?

Attachment image

1 Answer

Relevance
  • 1 month ago

    11.  [(cosx - sinx) / (cosx + sinx)] [ (cosx - sinx) / (cosx - sinx)]  =

        

           [(cosx)^2 - 2sinxcosx + (sinx)^2] / [(cosx)^2 - (sinx)^2] =

           (1 - sin2x) / cos2x = sec2x - tan2x

    12  Problem statement truncated (denominator of left side).

Still have questions? Get your answers by asking now.