Calcular la integral trigonométrica $\int\cos\left(nt\right)dt$

Calcular la integral

$\int\frac{dx}{1-sin\left(x\right)}$

Calcular la integral

$\int\frac{1}{1-sinx}dx$

Calcular la integral

$\int\frac{1}{\sin\left(x\right)-\cos\left(x\right)}dx$

Calcular la integral

$\int\frac{dx}{1+sinx+cosx}$

Calcular la integral

$\int\sec^4xdx$

Calcular la integral

$\int cos^23xdx$

Calcular la integral

$\int\sin^4\left(7x-2\right)dx$