Question

If cos A = 1/sin A then y cos A is not equal to cosec A

Answer 1

Cos A is equal to 1/ Sec A for all values of A. But Cos A is never equals to 1/sin A.

We know that all real values of Sine and Cosine lie from -1 to 1. But it is always from 0 to 1 for acute angles and right angle.