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Unfortunately, the browser used by Answers.com for posting questions is incapable of accepting mathematical symbols. This means that we cannot see the mathematically critical parts of the question. I am, therefore, not sure that I am answering the question that you want answered! If so, please resubmit your question spelling out the symbols as "plus", "minus", "times", "divided by", "equals" etc.

Both sin4x and sin6x tend to 0 as x tends to and so their product must also tend to 0.

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Q: Find Lim sin4x sin 6x when x--- 0?
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Find all degree solutions 2sin2 6x plus 3sin6x plus 1 equals 0?

2sin2(6x) + 3sin(6x) + 1 = 0 Solving the quadratic, sin(6x) = -1 or sin (6x) = -0.5 sin(6x) = -1 => 6x = 45+60n degrees for integer n sin(6x) = -0.5 => 6x = 35+60n or 55+60n degrees for integer n.


Find the limit of lim sin 4x sin 6x x 0?

Unfortunately, the browser used by Answers.com for posting questions is incapable of accepting mathematical symbols. This means that we cannot see the mathematically critical parts of the question. We are, therefore unable to determine what exactly the question is about and so cannot give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "times", "divided by", "equals" etc. As it appears, you seem to be seeking the limit of sin(4x)*sin(6x) as x tends to 0. Both components of the product tend to 0 as x tens to 0 and so the limit is 0. Bit I suspect that is not the limit that you are looking for.


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