If `z=i log(2-sqrt3),` then a. `cosz=-1` b. `(-1)/2` c. `1` d. `1/2`

If z=i log(2-sqrt(3)) then cosz

If z = ilog(2-sqrt3) , then cosz =

If z=i log(2-sqrt3), then cosz= a. -1 b. (-1)/2 c. 1 d. 2

If z=i log(2-sqrt3), then cosz= a. -1 b. (-1)/2 c. 1 d. 2

If z=i log(2-sqrt3), then cosz = a.-1 b. (-1)/2 c. 1 d. 2

If z=1/((1-i)(2+3i)), then |z| is (a) . 1 (b ). 1/sqrt(26) (c) . 5/sqrt(26) (d) . none of these

If z=(1)/((1-i)(2+3i)), then |z| is a.1 b.(1)/(sqrt(26)) c.(5)/(sqrt(26))d .non of these

If i z^3+z^2-z+i=0 , where i=sqrt(-1) , then |z| is equal to 1 (b) 1/2 (c) 1/4 (d) None of these

If i z^3+z^2-z+i=0 , where i=sqrt(-1) , then |z| is equal to 1 (b) 1/2 (c) 1/4 (d) None of these

1/((log)_(sqrt(b c))a b c)+1/((log)_(sqrt(c a))a b c)+1/((log)_(sqrt(a b))a b c) has the value of equal to: a. 1/2 b. 1 c. 2 d. 4