We will____have a picnic tomorrow.A.can B.be able to C.likely D.possible

We will____have a picnic tomorrow.A.can B.be able to C.likely D.possible LIAO PI A A 化简间sin（a-2pi)cos(a+pi）tan(a-99pi)cos(pi-a)sin(3pi-a)sin（-a-pi） pi pi cos(a-pi/2)/sin(5pi/2加a)×sin(a-2pi)×cos(2pi-a) 哪个 pi a nei 呜呜 csc(a+pi/2)=? sec(a-pi/2)=? sec(a+pi/2)=? sin(PI/2+a)=-4/5 a属于(Pi,3pi/2)则cos(Pi/3-a)为 cos(Pi+a)=-0.5,3/2Pi cos(a-pi/3)=12/13,pi/3 解方程：sin(2*a)/pi+(pi-a)/pi=0.8,最好能给出matlab程序. 化简(高一)[sin^2(pi+a)cos(pi+a)]/[tan(pi+a)cos^3(-pi-a)tan(2pi+a)] tana=2求sin(pi-a)cos(2pi-a)sin(-a+3pi/2)/tan(-a-pi)sin(-pi-a) f(a)=sin(pi-a)cos(2pi-a)tan(-a+3pi/2)/cos(-pi-a) 求 f(-31pi/3)的值 英语翻译What happens to the orbit of an Earth satellite when it is hit by space debris?We now discuss the modifications we need to make in PI anet and PI anetApp so that we can apply an impulsive force (a kick) by a mouse click.If we apply a vert