试以cotX表示cot3X 相关知识点: 试题来源: 解析 cot3X =1/tan3x=1/tan(x+2x)=(1-tanxtan2x)/(tanx+tan2x) tan2x=2tanx/(1-tan²x) ∴1-tanxtan2x=(1-3tan²x)/(1-tan²x) tanx+tan2x=(3tanx-2tan³x)/(1-tan²x) ∴cot3x=(1-3tan²x)/(3tanx-2tan³x)=(cot³x...
百度试题 结果1 题目【题目】如果 f(tanx)=cot3x ,那么f(cotx)等于( ) A、 tan3x B、 cot3x C、 -cot3x D、 -tan3x 相关知识点: 试题来源: 解析 【解析】 f(lnx)=1/(lnn3x) ; f cot3x 综上所述,答案选择:A 反馈 收藏
cot3X =1/tan3x=1/tan(x+2x)=(1-tanxtan2x)/(tanx+tan2x)tan2x=2tanx/(1-tan²x)∴1-tanxtan2x=(1-3tan²x)/(1-tan²x)tanx+tan2x=(3tanx-2tan³x)/(1-tan²x)∴cot3x=(1-3tan²x)/(3tanx-2tan³x)=(cot³x-3cotx)/(3cot²x-2) 解析看不懂?免费查看同类题...
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Evaluate : ("lim")(xvecpi/4)(1-cot^3x)/(2-cotx-cot^3x) 04:52 Evaluate the following limit: (lim)(x->2)(2^x+2^(3-x)-6)/(2^(-x)-2^... 00:58 Evaluate the following limit: (lim)(x->9)(3-sqrt(x))/(4-sqrt(2x-2)) 03:26 lim(n->oo)(sqrt(n^3-2n^2+1)+3...
结果一 题目 limx趋近于派 cotx/cot3x 答案 cot x-|||-tan 3x-|||-3 sec23x-|||-3cosx-|||-lim-|||-lim-|||-lim-|||-lim-|||-=3-|||-x→元-|||-cot 3x-|||-x→元-|||-tan x-|||-x→元-|||-secx-|||-X→元-|||-cos-3x相关推荐 1limx趋近于派 cotx/cot3x ...
结果1 题目【题目】lim_(x→∞)(cotx)/(cot3x) 相关知识点: 试题来源: 解析 【解析】解:x=t∴ 式lim_(x→0) rac(( rac(( rac1(x(ax+1)))( rac1(sin(π+10))) =lim_(t→0)(tan3t)/(tatt) =lim_(t0)(3t)/t=3 反馈 收藏 ...
当x趋向于0时,求极限 lim ((1+x)/(1-x))^cotx 这种题是属于不定式,1^无穷型的.做法都是利用重要极限(1+1/x)^x当x趋于0时极限是e.将原表达式改写成重要极限的形式:【(1+x)/(1-x)】^(cotx)={【1+2x/(1-x)】^[(1-x)/(2x)]}^【2x/(1-x) * cotx】大括号里面就是重要极限的形式了...
cotxcot2x−cot2xcot3x−cot3xcotx=1 View Solution differentiate(tanx)cotx+(cotx)tanx View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparation...
NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...