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Mathematics
Mathematics
Problem
Show that
sin
(
−
x
)
cos
x
+
cos
(
−
x
)
sin
x
=
0
\sin(-x)\cos x+\cos(-x)\sin x=0
sin
(
−
x
)
cos
x
+
cos
(
−
x
)
sin
x
=
0
for all real
x
x
x
.
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