cosalpha+cosbeta+cosgamma+cos(alpha+beta+gamma)কে তিনটি cosine-এর যোগফলরূপে প্রকাশ করো।
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Step by step video & image solution for Let cos(alpha+beta)""=4/5 and let sin (alpha+beta)""=5/(13) where 0lt=alpha,betalt=pi/4 , then t a n""2alpha= (1) (56)/(33) (2) (19)/(12) (3) (20)/7 (4) (25)/(16) by Maths experts to help you in doubts & scoring...
空间任意 直线 1 的方向余弦为 \cos \alpha , \cos \beta , \cos \gamma 则标量场 u ( x , y , z ) 沿 1 的方向导数为 相关知识点: 试题来源: 解析 磁通连续性原理的积分形式可以表示为。 A. \overrightarrow {B} \times d \overrightarrow {S}=0 B. \oint _{S} \overrightarrow {...
关于三角函数有如下的公式:\sin (\alpha + \beta )=\sin \alpha \cos \beta + \cos \alpha \sin \beta ①
Answer to: Verify the identity \cos(\alpha - \beta) - \cos(\alpha + \beta) = 2 \sin \alpha \sin \beta By signing up, you'll get thousands of...
Why is sinα−sinβ=2cos(2α+β)sin(2α−β)? https://www.quora.com/Why-is-sin-alpha-sin-beta-2-cos-left-frac-alpha+-beta-2-right-sin-left-frac-alpha-beta-2-right Manipulating the right side of...
माना cos(alpha+beta)=(4)/(5),sin(alpha-beta)=(5)/(13) जहाँ 0lealpha,betale(pi)/(4) तो tan2alpha=
关于三角函数有如下公式:\sin (\alpha + \beta )= \sin \alpha \cos \beta + \cos \alpha \sin \beta ,
关于三角函数有如下的公式:\cos (\alpha - \beta )= \cos \alpha \cos \beta \sin \alpha \sin \beta,由该公式可求得\cos 15^ \circ的值是() A. { \sqrt 6+ \sqrt 2}\div 4\ \ B. { \sqrt 6- \sqrt 2}\div 4\ \ C. { \sqrt 3- \sqrt 2}\div 4\ \ D. { \sqrt 3\ ...