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

Question

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

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1 month 2021-11-08T14:02:23+00:00 1 Answer 0 views 0

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  1. Emma
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    2021-11-08T14:04:00+00:00

    Answer:

     \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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