Odpowiedź:
[tex]sin\alpha =\frac{5}{13}[/tex]
[tex]x^2+5^2=13^2\\x^2+25=169\\x^2=144\\x=12[/tex]
A)
[tex]cos\alpha=\frac{12}{13}[/tex]
B)
[tex]tg\alpha =\frac{5}{12}[/tex]
C)
[tex]ctg\alpha=\frac{12}{5}[/tex]
