Find the value of `sum_(k=1)^10[sin((2pik)/(11))-icos((2pik)/(11))],wherei=sqrt(-1).`

The value of sum_(k=1)^(6)("sin"(2pik)/(7)-I"cos"(2pik)/(7)) is

Find the value of : 11^2

The value of sum_(k=1)^(6)[" sin"(2Kpi)/(7)- i " cos"(2Kpi)/(7)] is

The value of sum_(k=1) ^(10)( sin "" ( 2kpi )/( 11) + i cos "" ( 2kpi )/(11)) is :

Find the value of sin ((-11pi )/( 3))

Evaluate sum_(k=1)^11(2+3^k)

The value of sum_(k=1)^(13)(i^(n)+i^(n+1)) , where i=sqrt(-1) equals :

Find the square root of 11+2sqrt(30)

Given 0 le x le 1/2 then the value of tan[sin^(-1){(x)/(sqrt(2))+(sqrt(1-x^(2)))/(sqrt(2))}-sin^(-1)x] is