2csc2 A – 32 = 3cot2 B – 27 =
3(cot^2 - 9)=
(2csc^2 - 32) = 3( cot^2 - 3^2)
2(csc^2 - 16 )= 3( cot - 3)( cot + 3)
2(csc^2 - 4^2) =
2(csc - 4)( csc + 4)
Sin2 Ө – 18sin Ө + 81 = ( sin - 9)( sin - 9)
5cos3 w – 15 = 5(cos^3 - (3^(1/3))^3=
5(cos - 3)( cos^2 + 3^(1/3)*cos + 3^(1/3)^2 )