Answer:
csc θ + cot θ
Explanation:
(z + y)/x = z/x + y/x
sin θ = x/z
csc θ = 1/sin θ
csc θ = z/x
tan θ = x/y
cot θ = 1/tan θ
cot θ = y/x
z/x + y/x = csc θ + cot θ
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