收藏
下载资源 加入VIP,免费下载

广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx

上传人：eastlab115 文档编号：1093129 上传时间：2019-04-12 格式：DOCX 页数：6 大小：1.94MB
下载 相关 举报
广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx_第1页
第1页 / 共6页
广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx_第2页
第2页 / 共6页
广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx_第3页
第3页 / 共6页
广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx_第4页
第4页 / 共6页
广西2020版高考数学一轮复习高考大题专项练二高考中的三角函数与解三角形文.docx_第5页
第5页 / 共6页
点击查看更多>>
资源描述

1高考大题专项练二 高考中的三角函数与解三角形1.在平面四边形 ABCD中, ADC=90, A=45,AB=2,BD=5.(1)求 cos ADB;(2)若 DC=2 ,求 BC.2解 (1)在 ABD中,由正弦定理得 .BDsinA= ABsin ADB由题设知, ,5sin45= 2sin ADB所以 sin ADB= .25由题设知, ADB0, cosC= .5-12又 B+C= , sinB= .2 5-12

展开阅读全文
相关资源
猜你喜欢
  • UL 962 CRD-2018 UL Standard for Safety Household and Commercial Furnishings - Section Paragraph Reference 3 10 10 1 3 Exception No 4 12 1 Exception 2 51 3 - New 12 1 Exception -Re.pdf UL 962 CRD-2018 UL Standard for Safety Household and Commercial Furnishings - Section Paragraph Reference 3 10 10 1 3 Exception No 4 12 1 Exception 2 51 3 - New 12 1 Exception -Re.pdf
  • UL 962-2014 UL Standard for Safety Household and Commercial Furnishings (Fourth Edition Reprint with revisions through and including July 7 2017)《家居和商业家具的UL安全标准 (第四版)》.pdf UL 962-2014 UL Standard for Safety Household and Commercial Furnishings (Fourth Edition Reprint with revisions through and including July 7 2017)《家居和商业家具的UL安全标准 (第四版)》.pdf
  • UL 962A CRD-2015 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 5 6A and 13 5 Subject GFCI Protection in lieu of compliance with the Spill.pdf UL 962A CRD-2015 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 5 6A and 13 5 Subject GFCI Protection in lieu of compliance with the Spill.pdf
  • UL 962A CRD-2016 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 12 1 4 Subject Power Supply Cord Length (Edition 4 February 22 2016).pdf UL 962A CRD-2016 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 12 1 4 Subject Power Supply Cord Length (Edition 4 February 22 2016).pdf
  • UL 962A CRD-2017 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 13 7 and 50 24 Subject FPDU Employing Tamper Resistant Outlets (Edition 4 .pdf UL 962A CRD-2017 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 13 7 and 50 24 Subject FPDU Employing Tamper Resistant Outlets (Edition 4 .pdf
  • UL 962A-2014 UL Standard for Safety Furniture Power Distribution Units (Third Edition Reprint with revisions through and including September 8 2015)《家具配电单元的UL安全标准 (第三版)》.pdf UL 962A-2014 UL Standard for Safety Furniture Power Distribution Units (Third Edition Reprint with revisions through and including September 8 2015)《家具配电单元的UL安全标准 (第三版)》.pdf
  • UL 962A-2016 UL Standard for Safety Furniture Power Distribution Units (Fourth Edition Reprint with revisions through and including October 10 2017).pdf UL 962A-2016 UL Standard for Safety Furniture Power Distribution Units (Fourth Edition Reprint with revisions through and including October 10 2017).pdf
  • UL 962A-2018 UL Standard for Safety Furniture Power Distribution Units (Fifth Edition Reprint with revisions through and including July 13 2018).pdf UL 962A-2018 UL Standard for Safety Furniture Power Distribution Units (Fifth Edition Reprint with revisions through and including July 13 2018).pdf
  • UL 962A-2018 UL Standard for Safety Furniture Power Distribution Units (Fifth Edition).pdf UL 962A-2018 UL Standard for Safety Furniture Power Distribution Units (Fifth Edition).pdf
    • 相关搜索

    当前位置：首页 > 考试资料 > 中学考试

    copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
    备案/许可证编号：苏ICP备17064731号-1