∫02β’Ο€β„Žπ‘pm1⁑(x,ΞΎ)β’β„Žπ‘pm2⁑(x,ΞΎ)⁒dx=∫02β’Ο€β„Žπ‘ pm1⁑(x,ΞΎ)β’β„Žπ‘ pm2⁑(x,ΞΎ)⁒dx=0.