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Standard XII
Mathematics
Question
If
sin
2
A
+
sin
2
B
+
sin
2
C
=
9
/
4
,
then
∠
A
+
∠
B
=
∠
C
∠
A
+
∠
B
+
∠
C
=
0
∠
A
=
∠
B
=
∠
C
=
60
∘
∠
A
+
∠
B
=
90
∘
−
∠
C
A
∠
A
=
∠
B
=
∠
C
=
60
∘
B
∠
A
+
∠
B
=
∠
C
C
∠
A
+
∠
B
+
∠
C
=
0
D
∠
A
+
∠
B
=
90
∘
−
∠
C
Open in App
Solution
Verified by Toppr
Given equation
sin
2
A
+
sin
2
B
+
sin
2
C
=
9
4
Put
∠
A
=
∠
B
=
∠
C
=
60
∘
sin
2
60
+
sin
2
60
+
sin
2
60
⟹
3
×
(
√
3
2
)
2
⟹
3
×
3
4
=
9
4
∴
∠
A
=
∠
B
=
∠
C
=
60
∘
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1
Similar Questions
Q1
If
A
+
B
+
C
=
90
∘
, then
sin
2
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B
+
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C
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View Solution
Q2
If
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=
π
then the expression
sin
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sin
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sin
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sin
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reduces to
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Q3
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o
then
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+
sin
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+
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=
?
View Solution
Q4
If
A
+
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+
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=
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, then
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=
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Q5
If
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