In a Delta ABC,A=(pi)/(3) and b:c=2:3. If tan alpha=(sqrt(3))/(5),0 Find the values ofαlying between 0 andπfor which the inequality :tanα>tan3αis valid. If alpha=(2 pi)/(7), then tan alpha tan2 alpha+tan2 alpha tan4 alpha+tan4 alpha tan alpha View Solution P...
【解析】 答案: $$ ( 1 ) \tan \alpha ; ( 2 ) - \tan \alpha ; ( 3 ) - \tan \alpha ; ( 4 ) - \tan \alpha ; ( 5 ) \tan \alpha $$ 分析: (1)$$ \tan ( 2 \pi + \alpha ) = \tan \alpha $$ (2)$$ \tan ( - \alpha ) = - \tan \alpha , $$ (3)$$...
正切函数的诱导公式(1)$$ \tan ( 2 \pi + \alpha ) = \tan \alpha $$ ;(2)$$ \tan ( - \alpha ) = - \tan \alpha $$(3)$$ \tan ( 2 \pi - \alpha ) = - \tan \alpha $$(4)$$ \tan ( \pi - \alpha ) = - \tan \alpha $$;(5)$$ \tan ( \pi + \alpha...
1、首先你的这个公式是错的。应该为：360*cos(delta)/(4*z) -180*tan(alpha)/pi-alpha 2、360*cos(delta)/(4*z)：这一部分为单个轮齿的一半对应的圆心角（分度圆）3、180*tan(alpha)/pi-alpha为渐开线的展角，教科书上一般是弧度制展角θ=tanα/-α。4、这是锥齿轮当量齿轮展开后，展...
Step by step video & image solution for যদি tan alpha = x/y [ 0 lt alpha lt pi/2] হয়, তবে দেখাও যে, x cosec ""(alpha)/3 - y sec ""(alpha)/3 = 2 sqrt (x^2 + y^2) by Maths experts to help you in doubts & scoring excellen...
If alpha=(2 pi)/(7), then tan alpha tan2 alpha+tan2 alpha tan4 alpha+tan4 alpha tan alpha View Solution [ 7.If 0ltalphaltbetalt(pi)/(2) then [ 1) (tan beta)/(tan alpha)lt(alpha)/(beta), 2) (tan beta)/(tan alpha)gt(alpha)/(beta) 3) (tan alpha)/(tan beta)lt(alp...
【解析】 $$ f ( x ) = \tan x $$的周期为$$ T = k \pi ( k \in Z ) $$,最小正周期为 π∴$$ \tan ( x + \pi ) = \tan x $$ 则$$ \tan ( \pi + \alpha ) = \tan \alpha $$,其中$$ \alpha \neq k \pi + \frac { \pi } { 2 } $$,否则表达 式无意义; 综...
【题目】13.已知$$ \tan \alpha = \fra c { 4 } { 3 } $$,且α为第一象限角,则$$ \sin ( \pi + \alpha )
四、解答题(本大题共6小题,共70分.解答时应写出必要的文字说明、证明过程或演算步骤)17.(本小题满分10分)在①$$ \tan ( \pi + \alpha ) = 2 $$;②$$ \sin ( \pi - \alpha ) - $$$ \sin ( \frac { \pi } { 2 } - \alpha ) = \cos ( - \alpha ) $$;③$$ 2 \sin (...
【解析】因为$$ \tan ( \pi + \alpha ) = 2 $$,所以$$ \tan \alpha = 2 $$, $$(1) \frac { \sin ( \pi - \alpha ) - \cos ( \pi + \alpha ) } { \cos ( 2 \pi - \alpha ) + \sin ( - \alpha ) } \\ = \frac { \sin \alpha + \cos \alpha } { \...