(-(1)/(2))" Find the main value of "

Find the principal value of "cos"^(-1)(-1/(2)) and find the value of "cos"^(-1)(-1/(2))+"tan"^(-1)(-sqrt(3))-"cosec"^(-1)(2) .

If (1) =((1)/(2))^(x) . Find the value of x

Find the value of 1/2^-5

Find the value of 2^(1-4)

If a^(2)+(1)/(a^(2))=23, find the value of (a+(1)/(a))

If a^(2)+(1)/(a^(2))=102, find the value of a-(1)/(a)

Find the value of ( 1/2 )^3

Find the value of (1+i)^(2)

Find the value of: (-1/2)^4

If a^(2)+1/(a^(2))=7 , find the value of (a+1/(a))