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Byju's Answer
Standard X
Mathematics
Theorem of Geometric Mean
In the given ...
Question
In the given figure
A
B
C
is a right triangle and right angled at
B
such that
∠
B
C
A
=
2
∠
B
A
C
. Find
A
C
B
C
.
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Solution
x
+
2
x
+
90
=
180
∘
⟹
3
x
=
90
∘
⟹
x
=
30
∘
cos
C
=
B
C
A
C
⟹
cos
(
60
∘
)
=
B
C
A
C
⟹
1
2
=
B
C
A
C
⟹
A
C
B
C
=
2
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Q.
In the given figure, ABC is a triangle right-angled at B such that
∠
BCA = 2
∠BAC. Show that AC = 2BC.