Sylvainco

I want to charge a 40 volt lithium ion battery on a gas powered generator. I'm not sure how many watts the charger will use. The charger's input is 100-240 volts AC 1.1A. The output is 40V DC 1.5A.

From what I understand, which is very little i'm affraid, I must "assume" that the wattage needed would be 80 watts (volts x amps = watts... ?)

Can anyone confirm or correct me on this, please?

I currently use Office 2007's Powerpoint. I don't really use it for the slides, I use it for animations. Really basic ones, like moving objects around, rotating them, having objects appear and disappear, that sort of thing. I mainly use it to create lessons for a middle school math class. Problem is that Powerpoint's kind of limited. For example, it's sometimes hard to accurately move an object to the right spot, since the "trajectories" lines aren't precise.

So I'm asking if there are other programs out there that would do the same job, but a little better.

FYI: Haven't tried Powerpoint 2010. I don't want anything too complicated that will render stuff in 3D, that would be overkill. I've tried Prezi, but that doesn't at all do what I need. I tried OpenOffice a while back but didn't like it as an alternative to Word, never really tried the powerpoint alternative. Oh, and please, no MAC software. I do have access to Macs, but I loathe them.

Thanks.

Calculating a tangent of an angle by hand is kind of rough (taylor series... ugh), would take a long time, and knowledge of "Pi" is a prerequisite. Also, unless i'm mistaking (and correct me if i'm wrong), said angle *must* be in radians.

My question: Is there a way to calculate an angle's tangent, without using Pi ? Of course, this angle would be in degrees.

thanks.