1.cos(-17π/3)的值为?2.sin(-1200°)的值为?3.cot(-53π/6)的值为?
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发布时间:2024-09-30 21:36
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热心网友
时间:2024-10-17 09:50
1.cos(-17π/3)
=cosπ/3
=1/2
2.sin(-1200°)
=sin240°
=-sin60°
=-√3/2
3.cot(-53π/6)
=cotπ/6
=√3
热心网友
时间:2024-10-17 09:50
1.cos(-17π/3)
=cosπ/3
=1/2
2.sin(-1200°)
=sin240°
=-sin60°
=-√3/2
3.cot(-53π/6)
=cotπ/6
=√3