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Mathematics
Mathematics
Problem
Without using a calculator, compare
P
=
sin
20
∘
+
sin
40
∘
P=\sin 20^{\circ}+\sin 40^{\circ}
P
=
sin
2
0
∘
+
sin
4
0
∘
with
Q
=
sin
30
∘
Q=\sin 30^{\circ}
Q
=
sin
3
0
∘
. Which statement is correct? a)
P
+
Q
=
1
P+Q=1
P
+
Q
=
1
b)
P
=
Q
P=Q
P
=
Q
c)
P
>
Q
P>Q
P
>
Q
d)
P
<
Q
P<Q
P
<
Q
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