найдите ctg a, если [tex] \frac{4sina - 3cosa}{2cosa + \ \: 3sin \: a} = 3[/tex]... Created by girl3536. algebra-ru

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July 2022 1 6 Report

найдите ctg a, если
[tex] \frac{4sina - 3cosa}{2cosa + \ \: 3sin \: a} = 3[/tex]..

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vahe2907
$\frac{4sina \: - 3cosa}{2cosa \: + 3sina} = 3 \\ 4sina \: - 3cosa \: = 6cosa + 9sina \\ - 5sina \: = \: 9cosa \\ \frac{cosa}{sina} = - \frac{5}{9} \\ ctga = - \frac{5}{9}$

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