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Evaluate limx→0 sin(2+x)-sin(2-x)x - Mathematics

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Question

Evaluate `lim_(x -> 0)  (sin(2 + x) - sin(2 - x))/x`

Sum
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Solution

We have `lim_(x -> 0)  (sin(2 + x) - sin(2 - x))/x`

= `lim_(x -> 0) (2cos  ((2 + x + 2 - x))/2 sin  ((2 + x - 2 + x))/2)/x`

= `lim_(x -> 0) (2cos 2sinx)/x`

= `2cos 2 lim_(x -> 0)  sinx/x`

= 2cos 2 as `lim_(x -> 0)  sinx/x` = 1

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Chapter 13: Limits and Derivatives - Solved Examples [Page 229]

APPEARS IN

NCERT Exemplar Mathematics [English] Class 11
Chapter 13 Limits and Derivatives
Solved Examples | Q 5 | Page 229

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