theta$【诱导公式】 sin(a+k·2π)=sin,cos(a+k·2T)=cosa, 公式一 tan(a+k·2元)=tana(其中k∈Z) sin(+a)=-sina,cos(T+a)=-cosa 公式二 tan(π+a)=tan sin(-a)=-sin a,cos(-a)=cosa 公式三 tan(-a)=-tan a sin(-a)=sin a,cos(-a)=-cosa 公式四 tan(-a)=-tan...
If sin(90-theta)=1/(sqrt(2)) then the value of theta is .. 01:31 If 3 tan theta = sec theta, then find the value of cot theta. 01:55 Prove: (1-cos^2 A)cdot sec^2B + tan^2B (1-sin^2A) = sin^2A+tan^2B. 02:02 If P is the circumcentre of an acute angled triangle...
What is the simplified value of sin^(2) (90- theta) - [({sin(90-theta)... 01:40 Prove that : (sinthetacos(90^0-theta)costheta)/(sin(90^0-theta))+(cost... 03:30 (cos theta)/(sin(90^(@)+theta))+(sin(-theta))/(sin(180^(@)+theta))-(ta... 02:39 Simplify (sin(...
\theta是锐角 \DeltaABC的一个内角,满足如下四个公式: ① \sin(90^{\circ}-\theta)=\cos\theta ② \cos(90^{\circ}-\theta)=\sin\theta ③ \sin(180^{\circ}-\theta)=\sin\theta ④ \sin\theta\cos\theta 则 \sin10^{\circ}\sin50^{\circ}\sin70^{\circ}=-=. 相关知识点: 试题...
PROE解释这个关系式r=d1/2 theta=t*90 x=r*cos(theta)+r*sin(theta)*theta*(pi/180) y=r*sin(theta)-r*cos(theta)*theta*(pi/180) z+0
Keeping the definitions of these key terms in mind will help us when pursuing trigonometry problems. Answer and Explanation: Knowing that cos(90∘)=0 , and sin(90∘)=1, and abiding to the theta constraint {eq}(0^\circ < \theta<......
我刚学PROE关系式,从网上下了一些,但粘贴后总是出现,无效如下图r = 5 theta = t*3600 \1error\2发现无效符号't'。z =(sin(3.5*theta-90))+24*t\1error\2发现无效符号'theta'。
theta是展角,就是渐开线发生线在园上滚过的弧长对应的圆心角,t是pro/e的自变量,他总是从0变化到1,pi就是3.1419826 结果一 题目 pore 中的渐开线方程 的问题?“r=d1/2theta=t*90x=r*cos(theta)+r*sin(theta)*theta*(pi/180)y=r*sin(theta)-r*cos(theta)*theta*(pi/180)z=0”这中间的th...
极坐标系,z代表的是一个坐标点的集合 ,y轴线上半轴上半径为24的圆 “
PROE解释这个关系式r=d1/2 theta=t*90 x=r*cos(theta)+r*sin(theta)*theta*(pi/180) y=r*sin(theta)-r*cos(theta)*theta*(pi/180) z+0