1) projection angle formula
抛射角公式
1.
Solving this equation, a general expression of the projection angle formula was obtained and the Taylor formul.
在运动坐标系中，将材料视作不可压缩流体，考虑流体微元间的相互挤压作用，由动量方程出发，推导出爆轰驱动二维平板过程中物质元的抛射角方程，解该方程，得到抛射角公式的一般表达式，泰勒公式是该方程在定常条件下的解。
2) projecting angle
抛射角
1.
The best projecting angle of non-ideal projectile;
非理想抛体的最佳抛射角
2.
The formulae of time and range of pro- jectile with the projecting angle taking account into air friction are obtained by using the approximate method to solve the equation.
运用近似的方法处理超越方程,给出了考虑空气阻力的抛体运动落地时间和射程与抛射角的近似解析关系,并且与数值解进行了比较。
3) height formula
抛高公式
1.
Combined with practical engineering,this paper discusses controlling factor and treatment method of deflection in the process of cantilever construction of large-span PC continuous rigid frame bridge,and carries out proper amendment of theoretical height formula,which to offer a reference for relevant problems.
结合工程实例,对大跨度PC连续刚构桥在悬臂浇筑过程中的挠度控制因素及处理方法进行了探讨,并对理论抛高公式做出适当的修正,供相关问题参考借鉴。
4) projection angle equation
抛射角方程
1.
The projection angle equation of flyer plate under detonation driving;
爆轰驱动平板的抛射角方程
2.
In the moving reference frame, regarding the material as incompressible fluid and considering the force between the neighbouring segments, from the momentum equation, a projection angle equation of the planar flyer plate under detonation driving was deduced in this article.
在运动坐标系中，将材料视作不可压缩流体，考虑流体微元间的相互挤压作用，由动量方程出发，推导出爆轰驱动二维平板过程中物质元的抛射角方程，解该方程，得到抛射角公式的一般表达式，泰勒公式是该方程在定常条件下的解。
6) ideal flying out angle of shot
铅球理想抛射角
1.
We derive the relation of the ideal flying out angle of shot and calculate the best corresponding valuo of the ideal flying out angle and the maximum putting dis- tance,starting from locus equation of the starting throwing objects,using simple prima- ry mathematical method,as trigonometry,and evaluating root formulas of quadric e- quation.
从斜抛物体轨道方程出发,用二次方程求根公式和三角学等初等数学的简易方法,推导铅球理想抛射角的关系式。
补充资料：三角函数和角公式
又称三角函数的加法定理
是几个角的和（差）的三角函数通过其中各个角的三角函数来表示的关系
一般的最常用公式有:
sin(a+b)=sinacosb+sinbcosa
sin(a-b)=sinacosb-sinbcosa
cos(a+b)=cosacosb-sinasinb
cos(a-b)=cosacosb+sinasinb
tan(a+b)=(tana+tanb)/(1-tanatanb)
tan(a-b)=(tana-tanb)/(1+tanatanb)
注意：正切也可以表示为“tg” 如：tana=tga
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条