Can you please help me with this?
2 answers:
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If 
is left, that means 
was spent. So of the total amount is equal to 39.. Let's say x to the total amount. 
ANSWER
D) sin Y
EXPLANATION
The given triangle is a right triangle.
This implies that that:
Then we have
Recall that
But
When we do the substitution, we get,
Therefore cos(x) is a equivalent to sin(y).
The correct answer is D.