Hey,

I have a small question about multiplication.

From what I learned at school 1/5/6 equals to 6/5 (I moved 6 to the top)

Is this always true ? How about this example:

It is known that x/tanx equals

x/(cox/sinx) equals

x * 1/(cox/sinx)

Is it legal to say it equals

x * sinx/cosx ? (Move the sin upwards)

Thanks a lot.