Prove the following identities: `1/(sectheta-tantheta)=sectheta+tantheta`

Explanation

To prove the identity

\[ \frac{1}{\sec \theta - \tan \theta} = \sec \theta + \tan \theta, \]

we will start with the left-hand side (LHS) and manipulate it to show that it equals the right-hand side (RHS).

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