SOLUTION: (SinA-1)(tanA+secA)=-cosA Are you Abel to prof this? That's :)

Algebra ->  Trigonometry-basics -> SOLUTION: (SinA-1)(tanA+secA)=-cosA Are you Abel to prof this? That's :)      Log On


   

Question 747310: (SinA-1)(tanA+secA)=-cosA
Are you Abel to prof this? That's :)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
(SinA-1)(tanA+secA)=-cosA
Start with left side
%28sin%28A%29-1%29%28tan%28A%29%2Bsec%28A%29%29
%28sin%28A%29-1%29%28sin%28A%29%2Fcos%28A%29%29%2B%281%2Fcos%28A%29%29
%28sin%28A%29-1%29%28sin%28A%29%2B1%29%2Fcos%28A%29%29
%28sin%5E2%28A%29-1%29%2Fcos%28A%29%29
%28-cos%5E2%28A%29%29%2Fcos%28A%29=-cos%28A%29
verified: left side=right side