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The area of the region { 2 x 5 y | 1 x | : ) y , x ( − ≤ ≤ − } is equal to :

1. 2 5 sin –1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ 5 3 – 2 1
2. 4 5 π – 2 3
3. 4 3 π + 2 3
4. 4 5 π – 2 1

Correct answer: 4 5 π – 2 1

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