若cos(2π-α)=53,且α∈(-π2,0),则sin(π-α)=_____ 发布时间:2017-04-15 09:48 │ 来源:www.tikuol.com 题型:填空题 问题: 若cos(2π-α)=53,且α∈(-π2,0),则sin(π-α)=______.
题型:填空题 ----Will you be ________ this afternoon, Tom? ----It depends. I’m afraid I’ll be called in by my manager. A.suitableB.availableC.convenientD.enjoyable 查看答案