[" 10) "sum(r=0)^(n)nc(r)sin rn cos(n-r)...

[" 10) "sum_(r=0)^(n)nc_(r)sin rn cos(n-r)n=],[" i) "2^(n-1)" finnen "2" in "]

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sum_(r=0)^(n)nC_(r)sin rx*cos(n-r)x s equal to

Prove that sum_(r=0)^(n)C_(r)sin rx cos(n-r)x=2^(n-1)sin(nx)

sum_(r=0)^(n)nC_(r)(sin rx) is equal to

Prove that sum_(r=0)^(n) ""^(n)C_(r )sin rx. cos (n-r)x = 2^(n-1) xx sin nx .

Prove that sum_(r=0)^(n) ""^(n)C_(r )sin rx. cos (n-r)x = 2^(n-1) xx sin nx .

Prove that sum_(r=0)^(n)nC_(r)3^(r)=4^(n)

Find sum_(r=0)^n(r+1)*"^nC_rx^r

prove that sum_(r=0)^(n)3^(r)nC_(r)=4^(n)

The value of 2sum_(r=0)^(n)(^(^^)nC_(r)cos^(2)rx) is

sum_(r=1)^(n) (-1)^(r-1) ""^nC_r(a - r) =

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