Răspuns:
Explicație pas cu pas:
[tex]tg B = \frac{AC}{AB}\\\\\frac{24}{AB} = 3\frac{3}{7} = \frac{24}{7}\\\\AB = \frac{24*7}{24} = 7cm\\[/tex]
T. Pitgora:
BC² = AB² + AC² = 7² + 24² = 49 + 576 = 625
BC = √625 = √25² = 25 cm.
[tex]sinB = AC/BC = 24/25 = 0,96\\\\cosB = AB/BC = 7/25 = 0,28[/tex]
