Respuesta :

Answer:

5√2

Step-by-step explanation:

You can use the trig identities

We know angle = 45 as well as hypotenuse = 10

We can use either Sine or Cosine, I will use Sine

sin = opp/hyp

sin(45) = x/10

√2/2 = x/10

x = 5√2

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