利用计算器求sin20°tan35°的值时,按键顺序是___. 扫码下载作业帮拍照答疑一拍即得 答案解析 查看更多优质解析 举报 sin20°tan35°的值时,按键顺序是 sin 20 DMS×tan 35 DMS,故答案为:sin 20 DMS×tan 35 DMS. 解析看不懂?免费查看同类题视频解析查看解答...
tan27°+tan33°+ 3tan27°tan33°=___. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 ∵tan60°=tan(27°+33°)= tan27°+tan33° 1-tan27°tan33°= 3.∴tan27°+tan33°= 3- 3tan27°tan33°,则tan27°+tan33°+ 3tan27°tan33°= 3.故答案为: 3. 解析看...
(2)tan15°25′•tan74°35′=1,tan89°21′•tan0°39′=1; (3)依据(1),(2)你所发现的规律是:当α是锐角时,tanα•tan(90°-α)=1.规律为:互余的两锐角的正切的积为1. (4)tan1°•tan2°•tan3°·…·tan88°•tan89° =(tan1°•tan89°)(tan2°•tan88°)…(tan...
【题目】25.2(2)用计算器算三角比的值,按MODE进入DEG模式进行计算。sin80° ; cos35° ;tan70°;cot68°.(精确到0.0001)tan2321′; sin5142'20"; cos1312'9"; cot784525”.(精确到0.0001)求α:sinα=0.4924; cosα=0.5742 ; tanα=0.8416 ; cotα=2.75.在△ABC中,∠C=90°。1)已知b=20, ∠B...
2.1.382 Part 1 Section 17.14.35, uniqueTag (Unique Value for Record) 2.1.383 Part 1 Section 17.15.1.1, activeWritingStyle (Grammar Checking Settings) 2.1.384 Part 1 Section 17.15.1.3, alwaysMergeEmptyNamespace (Do Not Mark Custom XML Elements With No Namespace As Invalid) 2.1....
tan27°+tan33°+ 3tan27°tan33°=___. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 ∵tan60°=tan(27°+33°)= tan27°+tan33° 1-tan27°tan33°= 3.∴tan27°+tan33°= 3- 3tan27°tan33°,则tan27°+tan33°+ 3tan27°tan33°= 3.故答案为: 3. 解析看...
The various activation parameters such as energy of activation (AE*), Arrhenius factor (A), entropy of activation (AS*) were calculated from the rate measurements at 30 deg , 35 deg, 40 deg, and 45 deg C. A rate law has been derived on the basis of obtained data.Sheila Srivastava...
(1)1;1;1;1;(2)1;1;(3)90°-α;互为余角的两个锐角的正切值互为倒数;1 (1)按MODE,出现:DEG,按tan,1,“.”,“×”,按tan,89,“.”, =,显示:1;按AC,tan,2,“.”,“×”,按tan,88,“.”, =,显示:1;…按AC,tan,44,“.”,“×”,按tan,46,“.”, =,显示:1;按...
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