Darel and Linda Hardy
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Pre Trip in Prague
Czech Countryside
Sychrov Castle
Terezin
Bratislava
Bus Cruise
Vienna
City Tour
Concerts
Melk
Passau
Nuremberg
Home visit
Regensburg
Bamberg
Wurzburg
Frankfurt
Rudesheim
Heidelberg
Koblenz
Cologne
Amsterdam
Post Trip in Bruges
Bruges
Bike ride
Delft
Ghent
Darel and Linda 2014
Tokyo
Beijing
Shanghai
Yangtze
Xi’an
Guilin and the Li River
Hong Kong
Books about China
Mickelson Trail 2014
Darel and Linda 2015
South America 2015
Lima
Amazon rain forest
Cusco and Machu Picchu
Ecuador and the Galapagos
Darel and Linda 2016
Darel and Linda 2017
Darel and Linda 2018
Cabo San Lucas
Australia
New Zealand
Fiji
Route of the Maya
Darel and Linda 2019
Darel and Linda 2020
Darel and Linda 2021
Darel and Linda 2022
Darel and Linda 2023
Iowa Bike Tour
Darel and Linda 2024
Croatia at Christmas Time
Milestones
Erie Canal Bike Tour
Short trips
Rhone River
The Way I Remember It
Old Chicago Bike Tours
Darel’s Life on the Farm
Darel’s Campus Life
Darel’s Personal Life
Darel’s Professional Life
Darel’s Score Card
Darel’s Bookshelf
Darel’s Motor Vehicles
How I Became a Mathematician
Darel’s Musical Life
Darel’s Athletic Life
Mill Creek
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Books
Basic Calculus
Doing Mathematics
Doing Calculus
Calculus
Applied Algebra
AP Calculus
Precalculus
Business Calculus
eBooks
Applied Algebra
AP Calculus
Business Calculus
Calculus
Doing Mathematics
Precalculus
Rings and Modules
Statistics Primer
The First 101 Interesting Numbers
Topics in Mathematics
Animations
Curves and Functions
Logarithms
Parabola of best fit
Details
Riemann Sum
Morphing
Surface area
Polar morph
Instructions
Transforming a sphere into a cone
Transforming a sphere into a donut
Optimization problems
Box
Cone in a sphere
Cylinder in a cone
Cylinder in a sphere
Rectangle in an ellipse
Solids
Average radius
Cylindrical shells
Double integral
Solid of revolution
Three pyramids
Surfaces
Contours
Cross section
Partial derivative
Surface area
Area of a circle
What is an ellipse?
Rectangular Equations
Parametric Equations
Average Values
Average Distance
Unit Interval
Unit Square
Unit Circle
Unit Cube
Unit Sphere
Average Area
Rectangle
Square
Rotated Square
Triangle
Average volume
Cube
Rectangular Solid
Glossary of Math and Science
Quotes
←
Unit Circle
circle
By
Darel
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Published
March 17, 2025
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