यदि alpha = (pi)/(7) हो, तो ((1)/(cos alpha) + (2 cos alpha)/(cos 2 alpha)) का मान ज्ञात कीजिए |
Hint: 1+tan2α1−tan2α=1+tan4πtan2αtan4π−tan2α=tan(4π−2α) Why is sinα−sinβ=2cos(2α+β)sin(2α−β)? https://www.quora.com/Why-is-sin-alpha-sin-beta-2-cos-left-frac-alp...
if alpha+beta+gamma=2pi prove that cos^2alpha+cos^2beta+cos^2gamma-2cosalphacosbetacosgamma=1
如图所示$,$D' C' A B cosa cosy C A cosB B构造一个长方体$ABCD-A'B'C'D'$,使其三边分别为$\cos \alpha $、$\cos \beta $、$\cos \gamma $,由且$\cos ^{2}\alpha +\cos ^{2}\beta +\cos ^{2}\gamma =1$知,其对角线长为$1$;由$C'D\bot AD$,$AA'\bot AC$,$...
A. \( \cos \alpha = { { - 1} \over {\sqrt 3 }},\cos \beta = {1 \over {\sqrt 3 }},\cos \gamma = { { - 1} \over {\sqrt 3 }} \) B. \( \cos \alpha = {1 \over {\sqrt 3 }},\cos \beta = { { - 1} \over {\sqrt 3 }},\cos \gamma = { { -...
1.证明: _ ,且 _ 在 _ 增函数, 1.证明: _ ,且 _ 在 _ 增函数, 1.证明: _ ,且 _ 在 _ 增函数, 1.证明: _ ,且 _ 在 _ 增函数, 1.证明: _ ,且 _ 在 _ 增函数, 1.证明: _ ,且 _ 在 _ 增函数, \$y = \cos x\$ 在 _ 减函数, 解题...
代数输入 三角输入 微积分输入 矩阵输入 sin(α)+sin(β)=2sin(2α+β)cos(2α−β) 求解α 的值 α∈C 求解β 的值 β∈C
Step 1: Calculate α We know that:α=sin−1(√32)+sin−1(13) Using the known values:sin−1(√32)=π3 Thus, we can rewrite α as:α=π3+sin−1(13) Step 2: Calculate β Next, we calculate β:β=cos−1(√32)+cos−1(13) Using the known values:cos−1(√32)=π...
If alpha,beta are the roots of equation ax^(2)+bx+c=0, then what are t... 02:21 If sin alpha,cos alpha are the roots of the equation x^(2)+bx+c=0(c!=0... 02:32Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths Cengage Solut...