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The sandwich or squeeze method is something you can try when you can’t solve a limit problem with algebra. The basic idea is to find one function that’s always greater than the limit function (at least near the arrow-number) and another function that’s always less than the limit function. Both of your new functions must have the same limit as x approaches the arrow-number...

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Calculus

### How to Work with 30-60-90 and 45-45-90 Degree Triangles

In Pre-Calculus, you’re going to c...