Question: b. 4x - 4y - sin(x + y) = 0 , (1, It) b. 4x 4y sin(x + y) = 0 , (n,n)


b. 4x - 4y - sin(x + y) = 0 , (1, It)
b. 4x 4y sin(x + y) = 0 , (n,n)
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