Find all the first order partial derivatives for the following function.f(x, y) = sin2 (-8xy2 - y)
A. 
= 2sin (-8xy2 - y) cos (-8xy2 - y); 
= 2sin(-8xy2 - y) cos(-8xy2 - y)
B. 
= 2sin (-8xy2 - y) cos (-8xy2 - y); 
= (-32x - 2) sin (-8xy2 - y) cos (-8xy2 - y)
C. 
= -16y2sin (-8xy2 - y) cos (-8xy2 - y); 
= (-32xy - 2) sin (-8xy2 - y) cos (-8xy2 - y)
D. 
= -16y2sin (-8xy2 - y) cos (-8xy2 - y); 
= 2sin (-8xy2 - y) cos (-8xy2 - y)
Answer: C
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A. 2
B. 
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D. 0
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