Question

Sen100°- xsen40°= sen20°

Calcular x

Answer 1

x:
cos(pi/18)-x sin(40°) = sin(20°)

-(x sin(40°)) = sin(20°)-cos(pi/18)

x = (cos(pi/18))/(sin(40°))-(sin(20°))/(sin(40°))

x = (cos(pi/18)-sin(20°))/(sin(40°))

x=1