If $$\alpha$$ is an acute angle, which of the following options will NOT necessarily be equal to the value of cosec $$\alpha$$?

A

$$\frac{1}{cos\alpha}$$

B

$$\sqrt{1+ cot^{2}\alpha}$$

C

$$\frac{1}{sin \alpha}$$

D

$$\frac{cot\alpha}{cos\alpha}$$