Question

Si: senx + cosx = 1/3Hallar: sen 2x

Answer 1

Respuesta:

sen2x = -8/9

Explicación paso a paso:

senx + cosx = 1/3

(senx + cosx)² = (1/3)²

sen²x + 2.senx.cosx + cos²x = 1/9

2.senx.cosx + 1 = 1/9

sen2.x = 1/9 - 1

sen2x = -8/9

sen2x = -0,888