the value of `cos0+cos(pi/7)+cos((2pi)/7)+cos((3pi)/7)+cos((4pi)/7)+cos((5pi)/7) + cos((6pi)/7)`is (i) `1/2` (ii)`-1/2` (iii)`0` (iv)`1`

Similar Questions

Explore conceptually related problems

cos(pi/7)cos((2pi)/7)cos((4pi)/7)=

cos((2pi)/7)+cos((4pi)/7)+cos((6pi)/7)

The value of cos(pi/7)+cos((2pi)/7)+cos((3pi)/7)+cos((4pi)/7)+cos((5pi)/7) +cos((6pi)/7)+cos((7pi)/7) is

The value of cos((2pi)/7)+cos((4pi)/7)+cos((6pi)/7)+cos((7pi)/7)=

the value of (cos pi)/(7)cos(2(pi)/(7))cos(3(pi)/(7)) is

The value of cos((2pi)/7)cos((4pi)/7)cos((6pi)/7) is

The value of cos ""pi/7 cos ""(2pi)/(7) cos ""(3pi)/(7) is-

Show that cos(pi/7)cos((2pi)/7)cos((3pi)/7)=1/8

cos.(2pi)/(7)+cos.(4pi)/(7)+cos.(6pi)/(7)

cos((2pi)/(7))+cos((4pi)/(7))+cos((6pi)/(7))=