The value of the expression, `E=(cosx)/(1-sinx)+(cosx)/(1+sinx)` is

cosx{(cosx)/(1-sinx)+(1-sinx)/(cosx)}, is

cosx{(cosx)/(1-sinx)+(1-sinx)/(cosx)}, is

If x_(1),x_(2),...,x_(n) are real numbers, then the largest value of the expression sinx_(1)cosx_(2)+sinx_(2)cosx_(3)+...+sinx_(n)cosx_(1), is

If x_(1),x_(2),...,x_(n) are real numbers, then the largest value of the expression sinx_(1)cosx_(2)+sinx_(2)cosx_(3)+...+sinx_(n)cosx_(1), is

((sinx - cosx)/(sinx + cosx))

Solve (sinx)/(1+cosx)+(1+cosx)/(sinx)

cot^(-1)((cosx-sinx)/(cosx+sinx))

Prove that (cosx)/(1-sinx)=(1+cosx+sinx)/(1+cosx-sinx)