Lim x-> pi/4 of (1-tanx)/(sinx-cosx)

If we use: x=π/4 we will get: and thet is not defined limit. So we will transform the expression:Finally: And that´s it. Don´t forget to put "lim" in every line, except when you substitute variable x with π/4. Thank you.

M< 5 = 80 , < 2 = 80, < 6= 100, < 3= 100, < 7= 80, < 4= 80, < 8= 100