Solve Stationary Points: [-5, 5]

  • Thread starter Sheneron
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  • #1
[SOLVED] Stationary points

Homework Statement

Does the funtion g(x) = x + sin(x) have any stationary points on the interval [-5,5], if so where?

The Attempt at a Solution

Stationary points is where there is a 0 slope so here is what I did. Just need someone to check to see if this is right.

g'(x) = 1 + cos(x)
cos(x) = -1

So for the answer I got two stationary points at pi and -pi.
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  • #2
Looks fine to me. Note that pi and -pi are in fact in your interval.
  • #3
yes, thanks.

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