Respuesta :

AL2006
sin(19°) = 13/x

Multiply each side by 'x' :

x sin(19°) = 13

Divide each side by sin(19°) :

x = 13 / sin(19°)

Look up sin(19°) in a book or on your calculator. It's about 0.3256.

x = 13 / 0.3256 = about 39.93 .