The value of cosec 30° − cos 60° is:

If 3 cotA = 2, then find the value of $$\sqrt{\frac{3(\cosec^2 A - 1)}{(\sec^2 A - 1)}}.$$​

Find the value of $$\frac{\sin^2{68^\circ} + \sin^2{22^\circ}}{2 \left( \cos^2{17^\circ} + \cos^2{73^\circ} \right)}$$.

If $$\sin^4 \theta - \cos^4 \theta = \frac{1}{2}$$, find the value of $$2 \sin^2 \theta - 1$$.​

The value of (sec∅ − tan∅)² (1 + sin∅)² ÷ cos²∅ is