Answer:
x=36
y=54
Explanation:
tan(x) = 15/21
x=tan^-1(15/21)
x=35.537677792
x~36
To solve for y, either repeat the same process:
tan(y)=21/15
y=tan^-1(21/15)
y=54.462322208
y~=54
OR
180-90-x=y
180-90-36=54
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