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Let S = } 16 8 8 : ] 2 , 0 [ { 2 2 cos 2 sin 2 = + π ∈ θ θ θ . Then n(S) + ∑ ∈ θ ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + π ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ θ + π S 20 4 ec cos 2 4 sec is equal to :

1. 0
2. –2
3. –4
4. 12

Correct answer: –4

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