How do i solve this equation: 2cos(x)sin(x)=cos(x) ?

Which linear inequality is represented by the graph? !

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?