for example:

>>simplify(cos(i)*sin(u)/sin(i),trig)

                    cos(i)*sin(u)/sin(i)

Maple do'not  simplify cos(i)/sin(i)=ctan(i) atomaticly.

also  half angle formulas:

>>simplify(sin(i)/(cos(i)+1),trig)

           sin(i)/(cos(i)+1)

i want to get tan(i/f)

i stroe the x coordinate in arry A, and y in arry B

for example

A:=araat([x1,x2..,xn])

B:=ayaay([y1,y2..,yn])

how can i plot this data,

i had tried the follows expression:

plot(x,y)  or plot(x[i],y[i],i=1..n)

but they all return the wrong answer, why?

i define two variables as follow:

restart:

omega:=1

omega[i]:=2

i find the 'omega' i had defined  renewd by

omega:=table[i=1]

then type:

omega,omega[i]

result is:    omega, 2

how can i define these two variables in one worksheet?