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Mathematics
Problem
Calculate the value of
sin
47
∘
cos
13
∘
+
cos
47
∘
sin
13
∘
\sin47^{\circ}\cos13^{\circ}+\cos47^{\circ}\sin13^{\circ}
sin
4
7
∘
cos
1
3
∘
+
cos
4
7
∘
sin
1
3
∘
. a)
6
+
2
4
\dfrac{\sqrt6+\sqrt2}{4}
4
6
+
2
b)
3
2
\dfrac{\sqrt3}{2}
2
3
c)
1
2
\dfrac12
2
1
d)
2
2
\dfrac{\sqrt2}{2}
2
2
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