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Expand and simplify:
sin
(
π
−
x
)
and
sin
(
x
+
π
)
cos
(
π
2
−
θ
)
and
sin
(
π
2
−
θ
)
tan
(
ϕ
+
π
)
and
tan
(
ϕ
+
π
4
)