merall
͢lim 1cosax/x(2x)tanbx =?do not use L'hospital !
x→0



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NoelGreco
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Can you disambiguate with more grouping?

pasta
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1a/0 which makes it undefined

Stacey
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You could substitute sin/cos for the tan and see what that does.

merall
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the answer is a^2/4b

merall
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using the property:sinx/x=1,you 'll find the result

pasta
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i still think it is undefined

merall
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