The value of the expression 2sec−12+sin−112 is
The value of 2sec−1 2+sin−1(12) is
(a) π6 (b) 5π6 (c) 7π6 (d) 1
cos−1(cos7π6) is equal to a) 7π6 b) 5π6 c) π3 d) π6