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Mathematics
Problem
Evaluate
sin
(
π
2
−
225
∘
)
\sin\Bigl(\dfrac{\pi}{2}-225^{\circ}\Bigr)
sin
(
2
π
−
22
5
∘
)
. a)
0
0
0
b)
−
3
2
-\dfrac{\sqrt{3}}{2}
−
2
3
c)
−
2
2
-\dfrac{\sqrt{2}}{2}
−
2
2
d)
2
2
\dfrac{\sqrt{2}}{2}
2
2
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