The value of `prod_(k=0)^6 sin\ ((2k+1)pi)/14=` (A) `1/16` (B) `1/64` (C) `1/32` (D) none of these

sin^-1 (sin ((7pi)/6))= (A) (7pi)/6 (B) pi/6 (C) -pi/6 (D) none of these

sin^-1 (cos(sin^-1(sqrt(3)/2))= (A) pi/3 (B) pi/6 (C) - pi/6 (D) none of these

sin^-1 (-1/2)+tan^-1 (sqrt(3))= (A) -pi/6 (B) pi/3 (C) pi/6 (D) none of these

prod_ (k = 1) ^ (6) (sin ((2k pi) / (7)) - i cos ((2k pi) / (7))) =

The 6th term from the end of the G.P. 8, 4, 2, 1,...1/1024 (A) 1/64 (B)32 (C)1/32 (D)none of these

The value of 1+sum_(k=0)^(14) {cos((2k+1)pi)/(15) - isin((2k+1)pi)/(15)} , is

prod_(k=0)^(3)(1+cos backslash((2k+1)pi)/(8))=(A)(1)/(16)(B)-(1)/(8)(C)(1)/(8)(D)1

The value of x which satisfies sin^(-1)(1-x)-2sin^(-1)x=(pi)/(2) is (A) x=1 (B) x=(1)/(2)(C)x=0 (D) none of these

The value of 1+sum_(k=0)^(12){(cos((2k+1)pi))/(13)+i(sin((2k+1)pi))/(13)}