Respuesta :

Answer:

D.  m = 20 , n = 10.

Step-by-step explanation:

The sine of 60 is √3/2, so

sin 60 =  10√3 / m = √3/2

√3 m = 20 √3

Divide both sides by √3:

m = 20.

cos 60 = 1/2 =  n / 20

2n = 20

so n = 10.

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