Limit of sin(3x)/sin(5x) as x→0

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SUMMARY

The limit of the function \(\lim_{x\rightarrow 0} \frac{\sin(3x)}{\sin(5x)}\) is established as 0.6. The solution involves recognizing the continuity of the sine function and applying the limit property \(\lim_{u \to 0} \frac{\sin u}{u} = 1\). By strategically multiplying the expression by \(\frac{3x}{3x}\) and \(\frac{5x}{5x}\), the limit can be simplified to yield the correct result. This method is crucial for proving limits involving trigonometric functions.

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Homework Statement


Find \lim_{x\rightarrow 0} {\frac{\sin(3x)}{\sin(5x)}}


The Attempt at a Solution


I know that the limit equals 0.6 (by typing it into my calculator), but I have no idea how to prove this, or even where to start. I know that sin is continuous, so I theoretically should be able to just plug it in, but obviously this doesn't work because it isn't divisible by 0.
 
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Try multiplying by 3x/(3x) and 5x/(5x), and placing the numerators and denominators strategically. The basic idea is that \lim_{u \to 0} \frac{sin u}{u} = 1
 
Thank you! I can't believe I didn't think of that answer - that helped me figure out the later questions as well.
 

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