ПОМОГИтЕ ПОЖАЛУЙСТА РАСПиШИТЕ ПОДРОБНО!!
Известно,что [tex]sin \alpha = \frac{1}{5}
[/tex]

Найти : [tex]
cos \alpha [/tex] , [tex]
tg \alpha [/tex],[tex]
ctg \alpha [/tex]
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