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If cosx dx dy – ysinx = 6x, (0<x< 2 π ) and y ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ π 3 = 0, then y ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ π 6 is equal to :

1. – 3 4 2 π
2. – 2 2 π
3. 3 2 2 π
4. – 3 2 2 π

Correct answer: – 3 2 2 π

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