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The area enclosed by the curves y = sin x + cos x and y = | cos x – sin x | over the interval ⎥ ⎦ ⎤ ⎢ ⎣ ⎡ π 2 , 0 is -
- ) 1 2 ( 4 −
- ) 1 2 ( 2 2 −
- ) 1 2 ( 2 +
- ) 1 2 ( 2 2 +
Correct answer: ) 1 2 ( 2 2 −
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