Value of ` cos(pi/(2n+1))+cos((3pi)/(2n+1))+cos((5pi)/(2n+1))+...` upto n terms equals

Similar Questions

Explore conceptually related problems

Value of cos((pi)/(2n+1))+cos((3 pi)/(2n+1))+cos((5 pi)/(2n+1))+ upto n terms equals

Show that if n gt 2 cos^2 (pi/n) + cos^2 ((3pi)/n)+ cos^2((5pi)/n)+ ... n terms =n/2

The value of cos((pi)/(4))*cos((pi)/(8))*cos((pi)/(16))cos((pi)/(2^(n))) equals

sum_(n=1)^(20)[sin((2n pi)/(21))-i cos((2n pi)/(21))]=

Show that if n>2cos^(2)((pi)/(n))+cos^(2)((3 pi)/(n))+cos^(2)((5 pi)/(n))+...nterms=(n)/(2)

The value of sin pi/n + sin (3pi)/n+ sin (5pi)/n+... to n terms is equal to

If S=cos^2(pi/n) + cos^2((2pi)/n) +....+ cos^2((n-1)pi)/n , then S equals

If quad (cos^(2)pi)/(2)+(cos^(2)(2 pi))/(n)+...+(cos^(2)((n-1)pi))/(n) then s equals