 | John Bascombe Lock - 1882 - 378 pàgines
...of elevation of the top of the tower is observed to be 60° : what is the height of the tower? (3) From the top of a vertical cliff, the angle of depression...observed to be 30° : find the height of the cliff. • 04 TRIGONOMETRY. XIV. (5) A man 6 ft. high stands at a distance of 4 ft. 9 in. from a lamp-post,... | |
 | John Bascombe Lock - 1885 - 368 pàgines
...angle of elevation of the top of the tower is observed to be CO0 : what is the height of the tower? (3) From the top of a vertical cliff, the angle of depression...observed to be 30° : find the height of the cliff. (5) A man 6 ft. high stands at a distance of 4 ft. 9 in. from a lamp-post, and it is observed that his... | |
 | John Bascombe Lock - 1892 - 354 pàgines
...of elevation of the top of the tower is observed to be 60° : what is the height of the tower? (3) From the top of a vertical cliff, the angle of depression...observed to be 30° : find the height of the cliff. (4) From the top of a tower 117 feet high the angle of depression of the top of a house 37 feet high... | |
 | Edward Albert Bowser - 1892 - 202 pàgines
...elevation of the top of the tower is observed to be 60° : find the height of the tower. Ans. 346 feet. 58. From the top of a vertical cliff, the angle of depression...observed to be 30° : find the height of the cliff. Ans. 86.6 feet. 59. From the top of a tower 117 feet high, the angle of depression of the top of a... | |
 | Edward Albert Bowser - 1892 - 392 pàgines
...elevation of the top of the tower is observed to be 60° : ñnd the height of the tower. Ans. 346 feet. 93. From the top of a vertical cliff, the angle of depression...observed to be 30° : find the height of the cliff. Ans. 86.6 feet. 94. From the top of a tower 117 feet high, the angle of depression of the top of a... | |
 | Edward Albert Bowser - 1892 - 194 pàgines
...elevation of the top of the tower is observed to be 60° : find the height of the tower. Ans. 346 feet. 58. From the top of a vertical cliff, the angle of depression of a point on the shore 160 feet from the base of the cliff, is observed to be 30° : find the height of the cliff. Ans. 86.6... | |
 | John Bascombe Lock - 1896 - 242 pàgines
...angle of elevation of the top of the tower is observed to be 600 ; what is the height of the tower ? 3. From the top of a vertical cliff, the angle of depression...observed to be 30° ; find the height of the cliff. 4. From the top of a tower 117 feet high the angle of depression of the top of a house 37 feet high... | |
 | John Bascombe Lock - 1896 - 244 pàgines
...of elevation of the top of the tower is observed to be 00* ; what is the height of the tower Ч 9. From the top of ^a vertical cliff, the angle of depression of a point on the shore luO feet from the base of the cliff, is observed to be 30*; find the height of the cliff. f 4. From... | |
 | John Bascombe Lock - 1897 - 210 pàgines
...of elevation of the top of the tower is observed to be 60° ; what is the height of the tower ? 8. From the top of a vertical cliff, the angle of depression...observed to be 30° ; find the height of the cliff. 5. A man 6 feet high stands at a distance of 4 ft. 9 in. from a lamp-post, and it is observed that his... | |
 | John Wesley Young, Albert John Schwartz - 1915 - 248 pàgines
...is a point on the other bank directly opposite C. If £ BAC = 60°, find the width of the river. 3. From the top of a vertical cliff, the angle of depression...observed to be 30°. Find the height of the cliff. Ans. 86.6 ft. 4. From the top of a tower 120 feet high, the angle of depression of a house 40 feet... | |
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From the top of a vertical cliff, the angle of depression of a point on the shore 150 feet from the base of the cliff, is observed to be 30° : find the height of the cliff. 