Hi there!
A recipe for cake needs 3/4 of a cup of milk.
We are making 1/2 of the recipe, which means we also need half of the milk needed for the total recipe. Therefore, we can multiply 1/2 (half of the recipe) by 3/4 (the total amount of cups of milk needed for the total recipe).

Hence, we need
3/8 cups of milk
(You forgot to provide the choices!?!)
A.) Cos Z = b/c
B.) Sin X= c/b
C.) Tan X = b/a
D.) Tan Z = a/b
B is the answer, Sin X = c/b is wong because Sin X= b/c ( sin = opposite/ hypotenuse)
Hope this helps.!
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