one side of a square makes an angle A with x-axis and one vertex of the square is at the origin.prove that the equations of its diagonals are x(sinA+cosA)=y(cosA-sinA) and x(cosA-sinA)+y(sinA+cosA)=a,where a is the length of the side of the square.

DEEPENDRA SINGH , 7 Years ago

Grade 12