CBSE Class 10 Answered
trigonometry
Asked by | 11 Mar, 2009, 08:09: PM
Expert Answer
BC is the wall, at C there is a window, CD is the pole pointing upwards
To find length CD.
Solution:
1) In triangle ABC tan 300 =BC/AB
AB =10
2) In triangle ABC
(AB)2 +(BC)2 =(AC)2
(10
400=(AC)2
20 =AC
3) In triangle ACD tan30o =CD/AC
1/ root3 =CD/20
CD =20/root3
CD =11.5m
Therefore the rod is 11.5m long
3
Answered by | 05 Jul, 2009, 06:04: PM
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