In the adjoining figure, PQR is a right triangle right angled at Q. If PQ = 4 cm and PR = 8 cm then ∠P is equal to

1. 60°

2. 45°

3. 30°

4. 15°

Find the values of :

sec 30° tan 60° + sin 45° cosec 45° + cos 30° cot 60°