R L x secxy dA; R = {(x, y): 0 ≤ x ≤ π/3, 0 ≤ y ≤ 1}

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A: STEP 1 ​​ STEP 2 ​​ STEP 3 ​​  STEP 4 ​​  STEP 5 ​​  Conclusion​​

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