初中三角函数基础检测题 山岳 得分(一)精心选一选(共36分)1在直角三角形中各边都扩大2倍则锐角A的正弦值与余弦值都( ) A缩小2倍 B扩大2倍 C不变 D不能确定2在Rt△ABC中∠C=900BC=4sinA=则AC=( ) A3 B4 C5 D63若∠A是锐角且sinA
初中三角函数练习(一)精心选一选1在直角三角形中各边都扩大2倍则锐角A的正弦值与余弦值都( ) A缩小2倍 B扩大2倍 C不变 D不能确定12在Rt△ABC中∠C=900BC=4sinA=则AC=( ) A3 B4 C5 D63若∠A是锐角且sinA=则( ) A00
PAGE PAGE 1初中英语语法专项习题1-名词82页附参考答案1.( ) 1 She was very happy. She???????? ?in the maths test.A. makes a few mistake B. made a few mistakes C. made few mistakes D. makes few mistake( ) 2 We need
专项训练(五)形容词副词t laugh at her. She is?????????????any of the others in your .?as clever a student as B.?as a clever student asC.?so clever a student as D.?so a clever student this T-shirt i
锐角三角函数提高训练一.选择题(共7个小题)1. 如图在等腰Rt△ABC中∠C=90oAC=6D是AC上一点若tan∠DBA= SKIPIF 1 < 0 则AD的长为( )(A) 2 (B) SKIPIF 1 < 0 (C) SKIPIF 1 < 0 (D)1 2. 如图每个小正方形的边长为1ABC是小正方形的
初中英语语法专项习题-名词1.( ) 1 She was very happy. She_____in the maths test.A. makes a few mistake B. made a few mistakes C. made few mistakes D. makes few mistake( ) 2 We need some more____. Can you go and
锐角三角函数提高训练一.选择题(共7个小题)1. 如图在等腰Rt△ABC中∠C=90oAC=6D是AC上一点若tan∠DBA= SKIPIF 1 < 0 则AD的长为( )(A) 2 (B) SKIPIF 1 < 0 (C) SKIPIF 1 < 0 (D)1 2. 如图每个小正方形的边长为1ABC是小正方
三角函数专练1.设△ABC的内角ABC所对的边分别为abc已知a1b2cosCeq f(14).(1)求△ABC的周长(2)求cos(A-C)的值.2. 在中角对的边分别为且(1)求的值(2)若求的面积3.设的三个内角所对的边分别为.已知.(Ⅰ)求角A的大小(Ⅱ)若求的最大值.4在中角ABC所对的边分别为已知(1)求的值(2)当时求及的长.5已知中是三个内角的对边关于的不等式的解集是空集.(1
锐角三角函数提高训练(九年级)一.选择题(共7个小题)1. 如图在等腰Rt△ABC中∠C=90oAC=6D是AC上一点若tan∠DBA= SKIPIF 1 < 0 则AD的长为( )(A) 2 (B) SKIPIF 1 < 0 (C) SKIPIF 1 < 0 (D)1 2. 如图每个小正方形的边长为1ABC是
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