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1−2sin10°cos10°
sin10°−
1−sin210°
=______.
人气:423 ℃ 时间:2019-08-20 04:44:25
解答
1−2sin10°cos10°
sin10°−
1−sin210°
=
|sin10°−cos10°|
sin10°−cos10°
=
cos10°−sin10°
sin10°−cos10°
=-1
故答案为:-1
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