SexyChin SG 1/sin x = (sin x)^-1 d[ (sin x)^-1 ] = -1(sin x)^-2 * cos x = - 1/sin x * 1/sin x * cos x = - cosec x cot x (shown)
ProudlySingaporean SG i always remember like that one..... diff tan x=sec^2 x diff cotan x = -cosec^2 x so diff bla bla bla x= blah then diff coblah blah blah= -coblah
