Byju's Answer
Standard XII
Mathematics
Projection Formula
sin 3 x+sin 2...
Question
S
i
n
3
x
+
s
i
n
2
x
−
s
i
n
x
=
4
s
i
n
x
c
o
s
x
2
c
o
s
3
x
2
Open in App
Solution
s
i
n
3
x
+
s
i
n
2
x
−
s
i
n
x
=
s
i
n
2
x
+
s
i
n
3
x
−
s
i
n
x
=
s
i
n
2
x
+
s
i
n
3
x
−
s
i
n
x
[
s
i
n
A
−
s
i
n
B
=
2
c
o
s
(
A
+
B
2
)
s
i
n
(
A
−
B
2
)
]
=
2
s
i
n
x
c
o
s
x
+
s
i
n
3
x
−
s
i
n
x
[
s
i
n
2
A
=
2
s
i
n
A
c
o
s
A
]
=
2
s
i
n
x
c
o
s
x
+
2
c
o
s
2
x
s
i
n
x
=
2
s
i
n
x
(
c
o
s
x
+
c
o
s
x
)
=
2
s
i
n
x
(
2
c
o
s
3
x
2
c
o
s
x
2
)
=
4
s
i
n
x
c
o
s
x
2
c
o
s
3
x
2
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Similar questions
Q.
Prove:
sin
3
x
+
sin
2
x
−
sin
x
=
4
sin
x
cos
x
2
cos
3
x
2
Q.
Show that
sin
3
x
+
sin
2
x
−
sin
x
=
4
sin
x
cos
x
2
cos
3
x
2
Q.
Integrate with respect to x:
a)
sin
2
x
b)
cos
2
x
c)
4
sin
x
cos
x
2
cos
3
x
2
d)
1
√
x
+
3
+
√
x
+
2
Q.
Integrate with respect to
x
i)
sin
2
x
ii)
cos
3
x
iii)
4
sin
x
cos
x
2
cos
3
x
2
iv)
1
√
x
+
3
−
√
x
+
2
Q.
Evaluate
∫
4
sin
x
cos
x
2
cos
3
x
2
d
x
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