SubArea: Sine, cosine, tangent and cotangentLevel: BProject ID: 1103076609Source Problem: 2010016402Accepted: 1Clonable: 1Easy: 1Identify the function shown in the graph.f(x)=−sin(x+π4)f(x)=−sin(x−3π4)f(x)=cos(x+π4)f(x)=sin(x−π4)