Explicație pas cu pas:
a)
[tex]sin(\hat A) = \frac{BC}{AC} \\ cos(\hat A) = \frac{AB}{AC} \\ tg(\hat A) = \frac{BC}{AB} \\ ctg(\hat A) = \frac{AB}{BC} [/tex]
b)
[tex]sin(\hat C) = \frac{AB}{AC} \\ cos(\hat C) = \frac{BC}{AC} \\ tg(\hat C) = \frac{AB}{BC} \\ ctg(\hat C) = \frac{BC}{AB} [/tex]
