1. Find the principal value of cos‾¹x, for x = √3 / 2 * 1 point π/3 π/6 π/4 None of the above 2. Find the principal value of * 1 point π/3 π/6 2π/3 None of the above 3. Find the value of * 1 point 2π/3 2π/5 π/3 None of the above 4. Find the set of values of * 1 point (–∞, – 1) [1, ∞) ø None of the above 5. Find the value of * 1 point 2π/3 π/3 4π/3 None of the above 6. Find the principal value of * 1 point π/4 -π/4 3π/4 None of the above 7. Find the value of * 1 point π/3 π/4 2π/3 None of the above 8. Find the value of * 2 points π/4 π/3 π/6 None of the above 9. Find the value of * 2 points π/4 3π/4 2π/3 none of the above 10. Evaluate: * 2 points 1 -1 0 None of the above 11. Find the value of * 3 points -1 1 0 None of the above 12. Find the value of * 3 points -π/12 π/12 0 1 13. Which of the following is the principal value branch of cosec‾¹x? * 1 point (a) (b) (c) (d)