Question
lim n-->∞ cos(x/2)cos(x/4).......cos(x/2n)
Read 1 Solution.
dividing numretor and deno by 2sinx/2 then using indentity of sin2x = 2sinxcosx we finally get sinx / (2n sinx/2n) then solving we get sinx/x
VISHAL PHOGAT 11 year ago
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