Question

Calcule x e y : cos 31° = 0, 86 ; sen 31 ° =0,52 ; tg 31 ° = 0,6

x = 18,72 e y = 21,6
x = 69,2 e y = 30,96
x = 41,86 e y = 69,2
x = 30 ,96 e y = 18,72

Answer 1

$\Large\boxed{\begin{array}{l}\sf cos(31^\circ)=\dfrac{x}{36}\implies x=36cos( 31^\circ)\\\\\sf x=36\cdot0,86\\\\\sf x=30,96\\\\\sf sen(31^\circ)=\dfrac{y}{36}\\\\\sf y=36\cdot sen(31^\circ)\\\\\sf y=36\cdot0,52\\\sf y=18,72\end{array}}$