If A=sin((2pi)/7)+sin((4pi)/7)+sin((8pi)...

If `A=sin((2pi)/7)+sin((4pi)/7)+sin((8pi)/7)` and `B=cos((2pi)/7)+cos((4pi)/7)+cos((8pi)/7)` then `sqrt(A^2+B^2) ` is equal to

AI Generated Solution

Similar Questions

Explore conceptually related problems

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

Prove that 4cos((2pi)/7).cos(pi/7)-1=2cos((2pi)/7) .

Prove that: cos(pi/7)cos((2pi)/7)cos((4pi)/7)=-1/8

3.Prove that (i) "cos((2pi)/7)*cos((4pi)/7)*cos((8pi)/7)=1/8

Prove that cos ((2pi)/7)+ cos ((4pi)/7) + cos ((6pi)/7) = - 1/2

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

"cos(pi/15)cos((2pi)/15)cos((4pi)/15)cos((8pi)/15)=k

Prove that: cos(pi/7)cos(2pi/7)cos(4pi/7)=-1/8,

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

cos^2(pi/8) +cos^2((3pi)/8) +cos^2((5pi)/8)+cos^2 ((7pi)/8)=2