SubArea: Sine, cosine, tangent and cotangentLevel: BProject ID: 1003076604Accepted: 1Clonable: 0Easy: 0The graph of the function f(x)=−sin(−x) is identical with the graph of the function:g(x)=cos(x−π2)g(x)=−cos(x−π2)g(x)=cos(x+π2)g(x)=−sinx
