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6^2 + x^2 = 7^2
36 + x^2 = 49
x^2 = 13
x = √13
cosα=√13/7
tgα=6√13/13
b) tak samo jak poprzednio
6^2 + x^2 = 10^2
36 + x^2 = 100
x^2 = 64
x = 8
sinα=8/10=0,8
tgα=8/6=1 i 1/3