Odpowiedź :
[tex]cos\alpha =\frac{b}{c}[/tex]
b=4
c=7
a=?
[tex]c^{2} =a^{2} + b^{2}[/tex]
[tex]a^{2} = 49 - 16 = 33\\\\[/tex] //√
[tex]a=\sqrt{33}[/tex]
[tex]sin\alpha =\frac{\sqrt{33} }{7}[/tex]
[tex]tg\alpha =\frac{\sqrt{33} }{4}[/tex]
[tex]cos\alpha =\frac{b}{c}[/tex]
b=4
c=7
a=?
[tex]c^{2} =a^{2} + b^{2}[/tex]
[tex]a^{2} = 49 - 16 = 33\\\\[/tex] //√
[tex]a=\sqrt{33}[/tex]
[tex]sin\alpha =\frac{\sqrt{33} }{7}[/tex]
[tex]tg\alpha =\frac{\sqrt{33} }{4}[/tex]