Kat alfa jest ostry , wiedzac ze sin.alfa/cos.alfa +cos.alfa/sin.alfa = 2 oblicz wartosc sin alfa (razy) cos alfa

  [latex]frac{sinalpha}{cosalpha}+ frac{cosalpha}{sinalpha}=2[/latex]   [latex]frac{sin^2alpha+cos^2alpha}{cosalpha sinalpha}=2[/latex]   [latex]frac{1}{cosalpha sinalpha}=2[/latex]   [latex]cosalpha sinalpha= frac{1}{2} [/latex]