evaluate `[cos(pi/7)+i sin (pi/7)]^7`

Find the value of sin((pi)/(7))sin((2 pi)/(7))sin((4 pi)/(7))=

The value of sin""(pi)/(7)sin""(2pi)/(7)sin""(3pi)/(7), is

the value of sin((pi)/(7))+sin((2 pi)/(7))+sin((3 pi)/(7)) is

Find the value of cos(2 pi)/(7)+cos(4 pi)/(7)+cos(6 pi)/(7)

The value of cos((pi)/(7))+cos((2 pi)/(7))+cos((3 pi)/(7))+cos((4 pi)/(7))+cos((5 pi)/(7))+cos((6 pi)/(7))+cos((7 pi)/(7)) is 1(b)-1(c)0(d) none of these

cos^(-1)(sin((pi)/(7)))

The value of sin""(2pi)/(7)+sin""(4pi)/(7)+sin""(8pi)/(7), is

If z=6(cos(2(pi)/(7))+i sin(2(pi)/(7))) and w=3(cos(5(pi)/(7))+i sin(5(pi)/(7))) then what is the value of (z)/(w)

Statement I sin((2pi)/(7))+sin((4pi)/(7))+sin((8pi)/(7))=- 1/2 . Statement II cos. (2pi)/(7)+I sin . (2pi)/(7) is complex 7th root of unity.