Wyznacz wartości trygometryczne kąta alfa
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cos a= 8/17
8²+x²=17²
64+x²=289
x= 15
sin a= 15/17
tg a= 15/8
ctg a= 8/15
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cos a= 8/17
8²+x²=17²
64+x²=289
x= 15
sin a= 15/17
tg a= 15/8
ctg a= 8/15