Find the value of the following.
(i) 3 sin\(\frac{\pi}{6}\) sec \(\frac{\pi}{3}\) - 4 sin\(\frac{5 \pi}{6}\) cot\(\frac{\pi}{4}\)
(ii) sin2 \(\frac{\pi}{6} + cos^2 \frac{\pi}{3} - tan^2 \frac{\pi}{4}\)
(iii) 2 sin2 \(\frac{\pi}{6}\) + cosec2\(\frac{7 \pi}{3}\) cos2 \(\frac{\pi}{3}\)
iv) sin 75°
v) tan 15°