VectorAngle[RotationMatrix[Pi/2,{0,0,1}].RotationMatrix[Pi/2,{0,1,0}].{1,1,0},{1,1,0}]VectorAngle[RotationMatrix[Pi/2,{0,0,1}].RotationMatrix[Pi/2,{0,1,0}].{1,1,0},{1,1,0}]

• Natural Language
• Math Input