Question

Exercitiul 6 , va rog cat mai repede

Answer 1

$\frac{ab}{bc} = \frac{7}{25} \\ \frac{7}{bc} = \frac{7}{25} \\ bc = \frac{7 \times 25}{7} = 25$

${ac}^{2} = {25}^{2} - {7}^{2} = 625 - 49 = 576$

$ac = \sqrt{576} = 24$

$cos \: c = \frac{ac}{bc} = \frac{24}{25}$

$tg \: b = ctg \: c = \frac{24}{7}$