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Mathematics
Mathematics
Problem
Evaluate
4
sin
42
∘
cos
18
∘
+
4
cos
42
∘
sin
18
∘
4\sin 42^{\circ}\cos 18^{\circ}+4\cos 42^{\circ}\sin 18^{\circ}
4
sin
4
2
∘
cos
1
8
∘
+
4
cos
4
2
∘
sin
1
8
∘
, giving your answer in simplest radical form.
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