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Standard XII
Mathematics
Evaluation of a Determinant
Sin2A = 2SinA...
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Sin2A = 2SinACosA
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Q.
If
A
=
30
o
, verify that
sin
2
A
=
2
sin
A
cos
A
Q.
If
t
a
n
A
=
3
4
, find the value of
2
s
i
n
A
c
o
s
A
c
o
s
2
A
−
s
i
n
2
A
Q.
If
sin
2
A
=
1
2
, then the value of
1
2
sin
A
cos
A
is:
Q.
If A=
30
∘
,then:
s
i
n
2
A
=
2
s
i
n
A
c
o
s
A
=
2
t
a
n
A
1
+
t
a
n
2
A
State true or false.
Q.
If
A
=
30
0
, then
sin
2
A
=
2
sin
A
cos
A
=
2
tan
A
1
+
tan
2
A
If true enter 1 else 0
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