sinα + cosα=sinα +sin(90°-α)=2sin((α+90°-α)/2)*cos((α-90°+α)/2)=
(2sin45°)*(cos(α-45°))=2*√2*0.5cos(α-45°)=√2*cos(α-45°)
sinα + cosα=sinα +sin(90°-α)=2sin((α+90°-α)/2)*cos((α-90°+α)/2)=
(2sin45°)*(cos(α-45°))=2*√2*0.5cos(α-45°)=√2*cos(α-45°)