Find the value of Y.

Answer:
5√3
Step-by-step explanation:
The ratio of side lengths in a 30-60-90 triangle is ...
1 : √3 : 2
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Multiplying by 5, we have ...
1 : √3 : 2 = x : y : 10 = 5 : 5√3 : 10
The value of y is 5√3.
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Additional comment
y is the side adjacent to the 30° angle, so can be found from ...
Cos = Adjacent/Hypotenuse
Adjacent = Cos × Hypotenuse . . . . . multiply by hypotenuse
y = cos(30°)×10 = (√3)/2 × 10 . . . . . . substitute corresponding values
y = 5√3
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The value of x is 5.
Angle 60
Opposite - y
Hypotenuse - 10
OH - SOH
Sin60 = o/h
Sin60 = o/10
x10
O = sin60 x 10
O = 5 root 3
= 8.660254....
So, value of y = 8.66 to 2d.p
Hope this helps!