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Aplicas .
Productos Notables.
(a + b)² = a² + 2ab + b²
(senx + cosx)² =
sen²x + 2senxcosx + cos²x =
(sen²x + cos²x) + 2senxcosx = Pero sen²x + cos²x = 1 por identidad
fundamental
1 + 2senxcosx
Respuesta.
1 + 2senxcosx