Draw a diagram representing the following information.Two light houses are on each bank of a river,which are at distances of d meters and 2d meters from the boat on the river.The tops of towers are seen with angles of elevation a,b
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Answered by
1
Answer:
hi dj dtorm
Step-by-step explanation:
denzil62:
ok
Ans:
20 m
explanatory diagram
Let BC be the height of the tree,
AB be the breadth of the river
A be the initial position of the man
D be the final potion of the man
angle CAB
=
60
°
angle CDB
=
30
°
DA
=
40
m
Let AB =
x
Let BC =
h
Consider the triangle DBC
tan
30
=
B
C
D
B
=
B
C
D
A
+
A
B
=
h
40
+
x
1
√
3
=
h
40
+
x
h
=
40
+
x
√
3
⋯
(
1
)
Consider the triangle ABC
tan
60
=
B
C
A
B
=
h
x
√
3
=
h
x
h
=
√
3
x
⋯
(
2
)
Using (2) in (1)
h
=
40
+
x
√
3
√
3
x
=
40
+
x
√
3
3
x
=
40
+
x
2
x
=
40
x
=
20
20 m
explanatory diagram
Let BC be the height of the tree,
AB be the breadth of the river
A be the initial position of the man
D be the final potion of the man
angle CAB
=
60
°
angle CDB
=
30
°
DA
=
40
m
Let AB =
x
Let BC =
h
Consider the triangle DBC
tan
30
=
B
C
D
B
=
B
C
D
A
+
A
B
=
h
40
+
x
1
√
3
=
h
40
+
x
h
=
40
+
x
√
3
⋯
(
1
)
Consider the triangle ABC
tan
60
=
B
C
A
B
=
h
x
√
3
=
h
x
h
=
√
3
x
⋯
(
2
)
Using (2) in (1)
h
=
40
+
x
√
3
√
3
x
=
40
+
x
√
3
3
x
=
40
+
x
2
x
=
40
x
=
20
nooo it's wrong
Answered by
1
Answer:
Hi Denzil
Step-by-step explanation:
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