Question

nos triangulos retângulos, determine as medidas indicadas( use sen 65º= 0,9; cos 65º= 0,4 e tg 65º= 2,1

Answer 1

$\sin(30\degree)=\frac{10}{a}\\\frac{1}{2}=\frac{10}{a} \\a=2.10$

$\color{blue{a=20}\color{green}{\checkmark}$

$\cot(30\degree)=\frac{c}{10}\\\sqrt{3}=\frac{c}{10}$

$\color{blue}{c=10\sqrt{3}}\color{gree}{\checkmark}$