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数学
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sin20°cos40°+cos20°sin40°的值等于( )
A.
1
4
B.
3
2
C.
1
2
D.
3
4
人气:374 ℃ 时间:2020-01-28 10:03:23
解答
sin20°cos40°+cos20°sin40°
=sin60°
=
3
2
故选B.
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