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Trigonometry Examples
Popular Problems
Trigonometry
Verify the Identity cos(A-B)-cos(A+B)=2sin(a)sin(b)
cos
(
A
−
B
)
−
cos
(
A
+
B
)
=
2
sin
(
a
)
sin
(
b
)
cos
(
A
-
B
)
-
cos
(
A
+
B
)
=
2
sin
(
a
)
sin
(
b
)
Step 1
The provided
equation
is not an
identity
.
cos
(
A
−
B
)
−
cos
(
A
+
B
)
=
2
sin
(
a
)
sin
(
b
)
cos
(
A
-
B
)
-
cos
(
A
+
B
)
=
2
sin
(
a
)
sin
(
b
)
is not an
identity
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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