88. π/2 ≤ 0 ≤ π/2,0 ≤ r ≤ 3,0 ≤ z ≤r cos 0

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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I only need help with #88, thanks in advance.

Sketching a Solid In Exercises 87-90, sketch the solid that
has the given description in cylindrical coordinates.
87. 0 ≤ 0 ≤ π/2, 0 ≤ r ≤ 2, 0 ≤ z ≤ 4
88. − π/2 ≤ 0 ≤ π/2, 0 ≤ r ≤ 3, 0 ≤ z ≤ r cos
2π, 0 ≤ r ≤ a, r ≤ z ≤ a
89. 0≤ 0 ≤
90. 0 ≤ 0 ≤ 2π, 2 ≤ r ≤ 4, z² ≤ − r² + 6r – 8
Transcribed Image Text:Sketching a Solid In Exercises 87-90, sketch the solid that has the given description in cylindrical coordinates. 87. 0 ≤ 0 ≤ π/2, 0 ≤ r ≤ 2, 0 ≤ z ≤ 4 88. − π/2 ≤ 0 ≤ π/2, 0 ≤ r ≤ 3, 0 ≤ z ≤ r cos 2π, 0 ≤ r ≤ a, r ≤ z ≤ a 89. 0≤ 0 ≤ 90. 0 ≤ 0 ≤ 2π, 2 ≤ r ≤ 4, z² ≤ − r² + 6r – 8
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