Elements of Plane And Spherical Trigonometry : With Practical Applications
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In our eReader you can find the full English version of the book. Read Elements of Plane And Spherical Trigonometry : With Practical Applications Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elements of Plane And Spherical Trigonometry : With Practical Applications
What reading level is Elements of Plane And Spherical Trigonometry : With Practical Applications book?
To quickly assess the difficulty of the text, read a short excerpt:
A Vertical Angle is one the plane of whose sides is vertical.
An Angle of Elevation is a verti- jj B cal angle having one side horizontal and the inchned side above it ; as the angle GAB.
An Angle op Depression is a verti- cal angle having one side horizontal and the inclined side under it ; as the angle a" DBA.
133. To determine the height of a vertical object standing on d horizontal plane.
Let B be the top of the object, and let it be required to find its height B G.
6* X i G2 TEIGONOMETSY.
...Measure from the foot of the object, in the horizontal plane, any convenient dis- tance, as ^ C, as a base line, and at A observe the angle of elevation GAB.
Then, in the right-angled triangle ABC, we have known the side A C and the acute angle A ; therefore we can deter- mine the height B G hj Art. 121.
EXAMPLES.
1. Standing on the edge of a moat 40 feet wide, I observe that the wall of a fort upon the opposite brink subtends an angle at the point of observation of 36° 52' 12"; required the height of the wall.
What to read after Elements of Plane And Spherical Trigonometry : With Practical Applications?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Greenleaf to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A Vertical Angle is one the plane of whose sides is vertical.
An Angle of Elevation is a verti- jj B cal angle having one side horizontal and the inchned side above it ; as the angle GAB.
An Angle op Depression is a verti- cal angle having one side horizontal and the inclined side under it ; as the angle a" DBA.
133. To determine the height of a vertical object standing on d horizontal plane.
Let B be the top of the object, and let it be required to find its height B G.
6* X i G2 TEIGONOMETSY.
...Measure from the foot of the object, in the horizontal plane, any convenient dis- tance, as ^ C, as a base line, and at A observe the angle of elevation GAB.
Then, in the right-angled triangle ABC, we have known the side A C and the acute angle A ; therefore we can deter- mine the height B G hj Art. 121.
EXAMPLES.
1. Standing on the edge of a moat 40 feet wide, I observe that the wall of a fort upon the opposite brink subtends an angle at the point of observation of 36° 52' 12"; required the height of the wall.
What to read after Elements of Plane And Spherical Trigonometry : With Practical Applications?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Greenleaf to read onlineMoreLess
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