The Surface Expressed Parametrically by X = R Cos $\theta$ , Y = R Sin

question 73

Multiple Choice

The surface expressed parametrically by x = r cos $\theta$ , y = r sin $\theta$ , z = 90 - r² is

• A) a sphere
• B) an ellipsoid
• C) a paraboloid
• D) a cone
• E) a hemisphere

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