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Byju's Answer
Standard XII
Mathematics
Integration as Antiderivative
Cos 9A=sinA a...
Question
Cos 9A=sinA and 9A<90^°,then value of tanA?
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Q.
Question 7
If
c
o
s
9
α
=
s
i
n
α
and
9
a
<
90
∘
, then the value of
t
a
n
5
α
is
(A)
1
√
3
(B)
√
3
(C)
1
(D)
0
Q.
Show that:
sin
A
+
sin
5
A
+
sin
9
A
cos
A
+
cos
5
A
+
cos
9
A
=
tan
5
A
Q.
cos
8
A
cos
5
A
−
cos
12
A
cos
9
A
sin
8
A
cos
5
A
+
cos
12
sin
9
A
=
tan
4
A
.
Q.
If
tan
A
,
tan
B
,
tan
C
are the roots of the equation
2
x
3
−
5
x
2
−
2
x
+
4
=
0
,
then the value of
tan
(
A
+
B
+
C
)
is
Q.
Solve:
sin
A
−
sin
5
A
+
sin
9
A
−
sin
13
A
cos
A
−
cos
5
A
−
cos
9
A
+
cos
13
A
=
cot
4
A
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