lim(n->oo)sum(k=1)^n((sin)pi/(2k)-(cos)p...

`lim_(n->oo)sum_(k=1)^n((sin)pi/(2k)-(cos)pi/(2k)-(sin)(pi/(2(k+2))+(cos)pi/(2(k+2)))=`

lim(n->oo)sum(k=1)^n((sin)pi/(2k)-(cos)pi/(2k)-(sin)(pi/(2(k+2))+(cos)...
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sum (k = 1) ^ (6) (sin, (2 pi k) / (7) -i cos, (2 pi k) / (7)) =?
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Prove that sum(k=1)^(n-1)(n-k)cos(2kpi)/n=-n/2, wherengeq3 is an int...
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sum (k = 1) ^ (10) ((sin (2k pi)) / (11) + i (cos (2k pi)) / (11))
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The value of 1+sum(k=0)^(12){(cos((2k+1)pi))/(13)+i(sin((2k+1)pi))/(13...
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The value of sum(k=1)^(10)((sin(2 pi k))/(11)-i(cos(2 pi k))/(11)) is
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lim (n rarr oo) sum (k = 1) ^ (n) ((sin) (pi) / (2k) - (cos) (pi) / (2...
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The sum sum(m=1)^(4n+1)[sum(K=1)^(m-1){sin((2kpi)/m)-icos((2kpi)/m)}^m...
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The value of 1+sum(k=0)^(14) {cos((2k+1)pi)/(15) + isin((2k+1)pi)/(1...
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