JEE Advance - Mathematics (2004 - No. 24)
Given both $$\theta $$ and $$\phi $$ are acute angles and $$\sin \,\theta = {1 \over 2},\,$$ $$\cos \,\phi = {1 \over 3},$$ then the value of $$\theta + \phi $$ belongs to
$$\left( {{\pi \over 3},\left. {{\pi \over 2}} \right]} \right.$$
$$\left( {{\pi \over 2},{{2\pi } \over 3}} \right)$$
$$\left( {{{2\pi } \over 3},\left. {{{5\pi } \over 6}} \right]} \right.$$
$$\left( {{{5\pi } \over 6},\pi } \right]$$