The angles of elevation of the top of a rock and foot of a 100m high towers are respectively 30 and 45. Find
height of the rock
Answers
Answered by
0
Step-by-step explanation:
△ABD,∠ADB=45
o
∴tan45=
BD
AB
1=
BD
h
BD=h
In △AEC,∠ACE=30
o
∴tan30=
CE
AE
3
1
=
h
h−100
h=
3
h−100
3
3
h−h=100
3
h(
3
−1)=100
3
h=
3
−1
100
3
×
3
+1
3
+1
=
3−1
100
3
=50
3
Similar questions