New user? Sign up

Existing user? Log in

\[\left( \dfrac1{\cos a} - \dfrac{\sin a}{\cos a} \right) \left( \dfrac1{\cos a} + \dfrac{\sin a}{\cos a} \right) = \, ? \]

Assume \( a \neq 2n\pi \pm \dfrac{\pi}{2}.\)

Problem Loading...

Note Loading...

Set Loading...