An Elementary Treatise on Plane Trigonometry

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University Press, 1892 - 324 sider
 

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Side 299 - THE PITT PRESS SERIES. *„* Many of the books in this list can be had in two volumes, Text and Notes separately.
Side 300 - IV. By the same Editor. 2s. The Complete Works. By the same Editor. Two vols. Vol. I. containing the Introduction and Text.
Side 199 - The angular elevation of a tower at a place A due south of it is 30° ; and at a place B due west of A, and at a distance a from it, the elevation is 18°...
Side 52 - From the top of a tower, whose height is 108 feet, the angles of depression of the top and bottom of a vertical column standing in the horizontal plane are found to be 30° and 60° respectively ; required the height of the column.
Side 189 - A person standing on the bank of a river observes the elevation of the top of a tree on the opposite bank to be 51°...

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