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Question

limx0xnsinnxxnsinnx

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Solution

The correct option is A 0
limx0xnsinnxxnsinnx=limx0sinnx.nxn1+xn.nsinn1+xn.nsinn1x.cosxnxn1nsinn1x.cosx=limx0n.sinnx+nxn.cosxnncosx=limx0sinnx+xncosx1cosx=limx0nsinn1x.cosx+xncosxxncosxxnsinxsinx=limx0nxn2.cosx+xn1cosxxnx=limx0n(n2)xn3cosxnxn2sinxxn1cosx(n1)xn2cosxnxn1=0

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