Q40Fill in the blanks
MATHEMATICS Fill in the blanks in each of the Exercises 38 to 48. 1 38. The principal value of cos–1 – is__________. 2 3π 39. The value of sin–1 sin is__________. 5 40. If cos (tan–1 x + cot–1 3 ) = 0, then value of x is__________. 1