solve: 3 (b) uloy) = ity ² "x = 0 w(x, 3x) = sin x = 0 Wyy u(x,0) = sin x wy (x,01 = cox { (c) in R² aanxiliary Condition imposed on live y = 3x su sinx ·lug=cox on x-axis

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A: First we will write Inclusion-exclusion principle for two sets.

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A: Solution:-

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