Найдите tg a если cos a = 5/12

1. [latex]sin a = \sqrt{1-\frac{5^{2}}{12^{2}}}=[/latex]   [latex]=\sqrt{\frac{144}{12^{2}}-\frac{25}{12^{2}}}=[/latex]    [latex]=\sqrt{\frac{144-25}{12^{2}}}=[/latex]    [latex]=\sqrt{\frac{119}{12^{2}}}=[/latex]    [latex]=\frac{\sqrt{119}}{12}}[/latex]    2. [latex]tg a=\frac{sin a}{cos a}=[/latex]    [latex]tg a=\frac{\frac{\sqrt{119}}{12}}{\frac{5}{12}}=[/latex]    [latex]tg a=\frac{\sqrt{119}}{5}[/latex]