Question: Answer within 1- 2 hrs only, thankyou! 2. Using Double Integral, derive the formula for the area of a circle with radius r. (9 points)

Answer within 1- 2 hrs only, thankyou!

2. Using Double Integral, derive the formula for the area of a circle with radius r. (9 points) 2 (Hint: / Va? 3:201:12 = EVaQ $82 + a? Sin'1 (E) + constant.) Cl: 3. Using Double Integral, derive the formula for the surface area of a hemiSphere with radius R. (9 points)

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