Respuesta :

(sin a - cos a)² + (sin a + sin b)² =

sin² a -2sin a cos a + cos²a + sin²a +2cos s sin a + cos²a =

2sin²a + 2cos²a = 2(sin²a + cos²a) = 2*1 = 2

Answer:

2

Step-by-step explanation:

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