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P = (8; - 2)
tzn. x = 8 , y = -2 oraz r² = 8² +(-2)² = 64 + 4 = 68
r = √68 = √4*√17 = 2√17
sin α = y/r = -2/(2√17) = -1/√17 = -√17/17
cos α = x/r = 8/(2√17) = 4/√17 = (4√17)/17
tg α = y/x = -2/8 = -1/4
ctg α = x/y = 8/(-2) = - 4
α ∈ ( 270⁰; 360⁰ )
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