Question

Can someone plz help me with this I’m not understanding this
(The answer is not b)

Answer 1

D. m = 20 , n = 10.

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.