- #1

Glissando

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## Homework Statement

Find the limit:

lim (1-cos2x)/(xsinx)

x->0

## Homework Equations

Identities

## The Attempt at a Solution

I've done this over and over and over again! The answer is supposed to be 0 but I keep getting 2 ):

lim (1-cos2x)/(xsinx)

x->0

lim (1-1+2sin

^{2}x)/(xsinx)

x->0

lim (2sin

^{2}x)/(xsinx)

x->0

lim (2sinx)/x

x->0

= 2*1 = 2

Any help is appreciated! Thank you!