Two chords AB and AC of a circle subtends angles equal to 90∘ and 150∘ respectively at the centre. Find ∠BAC, if AB and AC lie on the opposite sides of the centre.

Two chords AB and AC of a circle subtends angles equal to 90∘ and 15

1.	Two chords AB and AC of a circle subtends angles equal to 90∘ and 150∘ respectively at the centre. Find ∠BAC, if AB and AC lie on the opposite sides of the centre.
Answer» Two chords AB and AC of a circle subtends angles equal to $90^{\circ} a n d 150^{\circ}$ respectively at the centre. Find $∠ B A C$ , if AB and AC lie on the opposite sides of the centre.