Another Log Function Problem?

Question

Find x for this problem

f(x)=4e^(xsinx)

I understand the properties but have no idea how to minipulate this problem or I guess in other words where to start!

Answer 1

Let y=f(x)

Then:

ln(xsin(x)) = y/4

Where ln is the natural log (easier than writing log base e).

That should give you a good start.

Ok, make each side e to the power of:

x•sin(x) = e^(y/4)

Here is where it may get a little tricky. How do you isolate x in this function?

How about: x = sin^-1[e^(y/4)/x]

You can play with that, but I don't see any answer here.

Answer 2

Gee...... I don't have a clue either. Maybe it's because you've given us a function in x, and **nothing** **else**.

If you just need a numerical value for x, I'd say use 2. Two is a good number. In fact, two is the *only* even prime number. Plus it's the base of the bninary number system. Those are all excellent reasons for using 2 for x.

But hey!! This is *your* problem and I don't want to hijack it, so you just use whatever number you like ☺

HTH

Doug