sum(r=1)^(n-1)cos^(2)((r pi)/(n))" is eq...

sum_(r=1)^(n-1)cos^(2)((r pi)/(n))" is equal to "-

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sum_(r=1)^(n-1)cos^(2)""(rpi)/(n) is equal to

Evaluate sum_(r=1)^(n-1) cos^(2) ((rpi)/(n)) .

Evaluate sum_(r=1)^(n-1) cos^(2) ((rpi)/(n)) .

The value of lim_(n rarr oo)(1)/(n)sum_(r=1)^(n)((r)/(n+r)) is equal to

The value of sum_(r=1)^n(-1)^(r+1)("^n C r)/(r+1) is equal to a. -1/(n+1) b. 1/n c. 1/(n+1) d. n/(n+1)

The value of lim_(n to oo)(1)/(n).sum_(r=1)^(2n)(r)/(sqrt(n^(2)+r^(2))) is equal to

The value of lim_(n to oo)(1)/(n).sum_(r=1)^(2n)(r)/(sqrt(n^(2)+r^(2))) is equal to

The value of lim_(n to oo)(1)/(n).sum_(r=1)^(2n)(r)/(sqrt(n^(2)+r^(2))) is equal to

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