\displaystyle\alpha=\frac{\theta+\phi}{2},\beta=\frac{\theta-\phi}{2} 代入式中即得 \displaystyle cos\theta+cos\phi=2cos(\frac{\theta+\phi}{2})\cdot cos(\frac{\theta-\phi}{2}) ◆将公式1-①、1-②相减按照同样的方法可以得出公式3-③, ◆将公式1-③、1-④相减按照同样的方法可以...
If :tanθ+cotθ=2,then:sinθ+cosθ View Solution (secθ+tanθ)(1−sinθ)=cosθ View Solution (sinθ+cosθ)(tanθ+cotθ)= View Solution cosθ(tanθ+2)(2tanθ+1)=? cosθ(tanθ+2)(2tanθ+1)=? tanθin terms ofcosθis... Iftanθ=1, thencosθ=………. Ifcosθ.sinθ...
【解析】 解:由题意得$$\left\{ \begin{matrix} \tan \theta = 2 , \\ \sin ^ { 2 } \theta + \cos ^ { 2 } \theta = 1 \end{matrix} \right.$$ 即$$\left\{ \begin{matrix} \frac { \sin \theta } { \cos \theta } = 2 , \\ \sin ^ { 2 } \theta + \cos ^ { 2...
【解析】 ∵$$ \tan \theta = - \frac { 1 } { 3 } , $$ ∴$$ \frac { \sin \theta } { \cos \theta } = - \frac { 1 } { 3 } $$① ∵$$ \sin ^ { 2 } \theta + \cos ^ { 2 } \theta = 1 $$② 由①②得$$\left\{ \begin{matrix} \sin \theta = \...
We need to find the value of (3sinθ+4cosθ3sinθ−4cosθ)2. Step 1: Rewrite the expression using tangentWe can express sinθ and cosθ in terms of tanθ. Since tanθ=sinθcosθ, we can write: sinθ=tanθ⋅cosθ. Substituting tanθ=54, we have: sinθ=54cosθ. Step 2...
\begin{aligned}r_n(x) = \frac{f^{(n+1)}(\theta x)}{n!}(1-\theta)^{n}x^{n+1} = (-1)^n\frac{n!}{(1+\theta x)^{(n+1)}n!}(1-\theta)^nx^{n+1}\end{aligned}\\于是\begin{aligned}|r_n(x)| \leq \frac{|x|^{n+1}}{1-|x|}(\frac{1-\theta}{1+\theta...
Step by step video & image solution for |[sin theta, tan theta, sec theta] , [cos theta, cot theta, cosec theta] , [1,2,3]|= by Maths experts to help you in doubts & scoring excellent marks in Class 11 exams.Updated on:21/07/2023Class...
【题目】已知$$ \sin \theta + \cos \theta = \frac { 1 } { 5 } $$,求sinθ、cosθ、tanθ的值.
7.证明下列恒等式:(1)$$ \tan \theta \cdot \fra c { 1 - \sin \theta } { 1 + \cos \theta } = \cot \theta \cdot \fra c { 1 - \cos \theta } { 1 + \sin \theta } ; $$(2)$$ \fra c { 1 + \tan ^ { 4 } \alpha } { \tan ^ { 2 } \alpha + \co...
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...