Question

Si: “x” es un ángulo agudo y Sen(3xº – 20º) – Cos(6x° + 38º) = 0 . Calcular R = 2xº + 14º

Answer 1

$sen(3x-20\›)-cos(6x+38\›)=0\\\\sen(3x-20\›)=cos(6x+38\›)\\\\sen(3x-20\›)=sen(52\›-6x)\\\\3x-20\›=52\›-6x\\\\9x=72\›\\\\x=8\›$

$R=2\cdot8\›+14\›=30\›$