`" 6."int(dx)/(sin x cos^(2)x)`

int(dx)/(cos x*sin^(2)x)

int(dx)/(sin^(6)x+cos^(6)x) =

int(sin x)/(cos^(2)x)dx

int(sin x)/(cos^(2)x)dx

" (2."int(sin x)/(sin x+cos x)dx

int(cos x)/(6+4sin x-cos^(2)x)dx

int(cos x)/(sin^(2)x)dx

int(cos x)/(sin^(2)x)dx

" (6) "int(cos x)/(4-sin^(2)x)*dx

Evaluate: ( i int(sin^(3)x-cos^(3)x)/(sin^(2)x cos^(2)x)dx (ii) int(5cos^(3)x+6sin^(3)x)/(2sin^(2)x cos^(2)x)dx