Home
Class 12
MATHS
Let alpha=e^((i9pi)/19), then Re(sum(r=1...

Let `alpha=e^((i9pi)/19)`, then `Re(sum_(r=1)^9(-1)^(r+1).alpha^r)` is equal to

Promotional Banner

Similar Questions

Explore conceptually related problems

sum_(r=1)^(oo)(2r-1)|(9)/(11)|^(r) is equal to

If alpha=(pi)/(13) then the value of prod_(r=1)^(6)cos r alpha is equal to

If I(r)=r(r^(2)-1), then sum_(r=2)^(n)(1)/(I(r)) is equal to

If I(r)=r(r^2-1) , then sum_(r=2)^n 1/(I(r)) is equal to

If sum_(r=1)^(oo)(1)/((2r-1)^(2))=(pi^(2))/(8) , then sum_(r=1)^(oo) (1)/(r^(2)) is equal to

If sum_(r=1)^n I(r)=(3^n -1) , then sum_(r=1)^n 1/(I(r)) is equal to :

Let sum_(r=1)^(n)r^(4)=f(n)," then " sum_(r=1)^(n) (2r-1)^(4) is equal to

sum_(r=1)^(n) r^(2)-sum_(r=1)^(n) sum_(r=1)^(n) is equal to

sum_(r=1)^(n) r^(2)-sum_(r=1)^(n) sum_(r=1)^(n) is equal to