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>> No.15415012 [View]
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15415012

>>15414652
Why are we allowed to take the factosr sin(x) and cos(x) out of their limits?? I'm assuming that is what is happening. Does this follow from the product rule? I've looked at like four separate textbooks and no one seems to explain this.

I've seen it explained that its because those factors don't depend on the limit so its okay to do but that explanation doesn't really explain much to me.

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