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A comprehensive history of trigonometry from ancient times to the Renaissance.
The eleventh International Congress on Mathematical Education will meet in Monterrey, Mexico from July 6 to July 13, 2008.
What is the perpendicular height of a cloud when it's angles of elevation were 35 degrees and 64 degrees as taken by two observers?
This book explores the history of mathematics from the perspective of the creative tension between common sense and the "impossible" as the author follows the discovery or invention of new concepts that have marked mathematical progress.

Determine the radii of three equal circles decribed within and tangent to a given circle, and also tangent to each other
The edge of a cloud is at an altitude of 20 degrees and the sun above it at 35 degrees. The shadow cast by the edge of the cloud fall on a object 2300 yards away, how high is the cloud?
Suppose that for every 4 cows a farmer has, he should plow 1 acre of land, and allow 1 acre of pasture for every 3 cows; how many cows could he keep on 140 acres?

In this collection of essays on modern trends and issues in the history of mathematics, consideration of mathematics history in the classroom is often more theoretical than practical.

Given the fraction ax/ (a-x ), convert it into an infinite series.
Wanting to know the breadth of a river, I measured a base of 500 yards in a straight line close by one side of it.