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1. Calculate the surface area of ​​the rotary formed due to the rotation of the arc...

1. Calculate the surface area of ​​the rotary formed due to the rotation of the arc x = a (Ꝋ -sin Ꝋ), y = a (1 -cos Ꝋ) with respect to the x axis

2. Determine the volume of a rotating object formed due to the velocity of the area bounded by x = 9 - y2 and x - y - 7 = 0 with respect to the x = axis. Use the shell method.

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