Question

me ajudem pfvr❌❌❌❌❌❌❌❌❌❌❌❌❌​

Answer 1

Resposta:

$a)\\ tg30^{\circ}={x\over30}\\ \\ {\sqrt{3} \over3}={x\over30}\\ \\ 3x=30\sqrt{3} \\ x={30\sqrt{3} \over3}\\ \\ x=10\sqrt{3}$

$b)\\ sen60^{\circ}={12\sqrt{3} \over a}\\ \\ {\sqrt{3} \over2}={12\sqrt{3} \over a}\\ \\ a\sqrt{3} =24\sqrt{3} \\ \\ a={24\sqrt{3} \over\sqrt{3} }=24\\ \\ tg60^{\circ}={12\sqrt{3} \over b}\\ \\ \sqrt{3} ={12\sqrt{3} \over b}\\ \\ b\sqrt{3} =12\sqrt{3} \\ \\ b={12\sqrt{3} \over\sqrt{3} }=12$

$c)\\ sen45^{\circ}={x\over10}\\ \\ {\sqrt{2} \over2}={x\over10}\\ \\ 2x=10\sqrt{2} \\ \\ x={10\sqrt{2} \over2}=5\sqrt{2}$

$d)\\ sen65^{\circ}={x\over9}\\ \\ 0,91={x\over9}\\ \\ x=9.(0,91)\\ \\ x=8,19$