SOLUTION: Express f(x)=cosx+2sinx as Rcos(x-y) for 0<y<pi/2. Hence find the maximum and minimum points for 0<x<2pi. I managed to express it as Rcos(x-y) which is sqrt5cos(x-1.11radians).

Algebra ->  Trigonometry-basics -> SOLUTION: Express f(x)=cosx+2sinx as Rcos(x-y) for 0<y<pi/2. Hence find the maximum and minimum points for 0<x<2pi. I managed to express it as Rcos(x-y) which is sqrt5cos(x-1.11radians).      Log On