1-sinQ^4-cosQ^4
=(sinQ^2+cosQ^2)^2-sinQ^4-cosQ^4
=2sinQ^2cosQ^2
1-sinQ^6-cosQ^6
=(sinQ^2+cosQ^2)^3-sinQ^6-cosQ^6
=3sinQ^4cosQ^2+3sinQ^2cosQ^4
=3sinQ^2cosQ^2(sinQ^2+cosQ^2)
=3sinQ^2cosQ^2