Mathematics: If sin y = 9/c and tan y = 9/d what is the vaule of cos y

If sin y = 9/c and tan y = 9/d what is the vaule

Ответ:

miracle9704

25.01.2022

$\huge \purple { \boxed{\therefore \: \cos \: y = \frac{d}{c} }}$

Step-by-step explanation:

$\because \: \tan \: y = \frac{ \sin \: y}{ \cos \: y} \\ \\ \therefore \: \cos \: y = \frac{ \sin \: y}{ \tan \: y} \\ \\ \therefore \: \cos \: y = \frac{ \frac{9}{c} }{ \frac{9}{d} } \\ \\ \therefore \: \cos \: y = \frac{9}{c} \times \frac{d}{9} \\ \\ \huge \red{ \boxed{\therefore \: \cos \: y = \frac{d}{c} }}$

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Ответ:

connermichaela

28.05.2022

Mathematics

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If sin y = 9/c and tan y = 9/d what is the vaule of cos y

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