Exercise 2.1

sin-1 1/2  −   2. cos-1 3/2       3. cosec-1 (2)

tan-1 ( 3)− 5. cos-1 1/2  −   6. tan-1 (-1) 7. sec-1 2/3      8. cot-1 ( 3) 9. cos-1 1/2  −   10. cosec-1 ( 2− ) Find the values of the following: 11. tan-1(1) + cos -1 1/2 − + sin-1 1 − 12. cos-1 1/2 + 2 sin -1 1 13. If sin-1 x = y, then (A) 0 ≤ y ≤ π (B) 2 2 yπ π− ≤ ≤ (C) 0 < y < π (D) 2 2 yπ π− < < 14. tan-1 ( )13 sec 2−− − is equal to (A) π (B) 3 / π− (C) 3 / π (D) 2 π