" If "1.int(cos xdx)/((1+sin x)(2+sin x))

int(cos xdx)/((a+sin x)(2+sin x))

int(cos2xdx)/(1+sin x cos x)

int(xdx)/(1+sin x)

int(cos xdx)/(sqrt(1+sin x))=2((sin x)/(2)+(cos x)/(2))+c

int(sin xdx)/(1+cos x)^3

int (sin xdx)/(cos 2x)

int(sin2xdx)/(1+sin^(2)x)

int(sin xdx)/((b+a cos x)^(2))

" If "I=int(cos^(3)xdx)/((sin^(4)x+3sin^(2)x+1)tan^(-1)(sin x+cos ecx)),=-A log|tan^(-1)(sin x+cos ecx)|+C" ,then A is equal "

int(cos x+2sin xdx)/(3cos x+4sin x)