The MTH 121 blog can be used for discussing issues in MTH 121 - Trigonometry. Students are encouraged to start a post for each topic and be involved in the ongoing discussions.
I am a lecturer at the University of Guyana, Berbice Campus in the Department of Computer Science. I am also currently the coordinator of the Division of Natural Sciences at the campus.
A tower stands on level ground. From a point P on the ground, the angle of elevation of the top of the tower is 26. Another point Q is 3m vertically above P and from this point the angle of elevation of the top of the tower is 21.Find the height of the tower. The problem refers to a triangle ABC. The answer should be 14.1 but I am unable to prove this fact.
QUES (posted by student) A tower stands on level ground. From a point P on the ground, the angle of elevation of the top of the tower is 26. Another point Q is 3m vertically above P and from this point the angle of elevation of the top of the tower is 21.Find the height of the tower. The problem refers to a triangle ABC. The answer should be 14.1 but I am unable to prove this fact.
ANS: Use the sine rule to solve this problem. Consider the tower whose top is denoted by T. Now considering triangle PQT, use the sine rule to find length of side PT, using 111^0 and 5^0 and side 3m. After find PT, use this with the sine ratio to find the height of the tower. The sine rule will be covered in a later lecture.
The following link contains information about the first set of lectures.
ReplyDeletehttp://www.analyzemath.com/Trigonometry.html
Good link!
ReplyDeleteA tower stands on level ground. From a point P on the ground, the angle of elevation of the top of the tower is 26. Another point Q is 3m vertically above P and from this point the angle of elevation of the top of the tower is 21.Find the height of the tower. The problem refers to a triangle ABC. The answer should be 14.1 but I am unable to prove this fact.
ReplyDeleteQUES (posted by student) A tower stands on level ground. From a point P on the ground, the angle of elevation of the top of the tower is 26. Another point Q is 3m vertically above P and from this point the angle of elevation of the top of the tower is 21.Find the height of the tower. The problem refers to a triangle ABC. The answer should be 14.1 but I am unable to prove this fact.
ReplyDeleteANS: Use the sine rule to solve this problem. Consider the tower whose top is denoted by T. Now considering triangle PQT, use the sine rule to find length of side PT, using 111^0 and 5^0 and side 3m. After find PT, use this with the sine ratio to find the height of the tower. The sine rule will be covered in a later lecture.