3 It is given that \(\theta\) is the acute angle such that \(\sec \theta \sin \theta = 36 \cot \theta\).
- Show that \(\tan \theta = 6\).
- Hence, using an appropriate formula in each case, find the exact value of
(a) \(\tan \left( \theta - 45 ^ { \circ } \right)\),
(b) \(\quad \tan 2 \theta\).