Question

no triângulo retângulo ABC determine:

Answer 1

Trigonometria no triângulo retângulo:

$\begin{gathered}\boxed{\begin{array}{lr} { \mathtt{sen \alpha = \frac{cat.oposto}{hipotenusa} }} \mathtt{}\end{array}}\end{gathered}$

$\begin{gathered}\boxed{\begin{array}{lr} { \mathtt{cos \alpha = \frac{cat.adjascente}{hipotenusa} }} \mathtt{}\end{array}}\end{gathered}$

$\begin{gathered}\boxed{\begin{array}{lr} { \mathtt{tg \alpha = \frac{cat.oposto}{cat.adjascente} }} \mathtt{}\end{array}}\end{gathered}$

Resolvendo a sua questão:

A)

$\boxed{sen \: a= \frac{4}{5} }$

B)

$\boxed{cos \: a = \frac{ 3}{5} }$

C)

$\boxed{tg \: a = \frac{4}{3} }$

D)

$\boxed{sen \: c = \frac{3}{5} }$

E)

$\boxed{cos \: c = \frac{4}{5} }$

F)

$\boxed{tg \: c = \frac{3}{4} }$

Espero ter ajudado!