I am practicing finding a side of an angle on Khan Academy. I understand SOH CAH TOA and which sin, cos, tan to choose from. But, I don't understand why they multiply sometimes to find the side and divide other times. I am using a calculator.

Here is a multiply example


and a divide example


thanks.


Question: What to keep in mind when copying a small card game?
Answer: Copyright concerns aside, I can help with the printing. I recently made a 100-card game (actually a Fluxx variant) like so:

I printed out the cards in sheets of nine cards (onto standard A4 paper), then chopped them out with scissors. This might take a while if you've got too many, but 80 should be OK.

To make them more sturdy, I bought 100 penny-sleeves and got a bunch of old, unwanted Magic cards (try your FLGS or CCG-playing friends if you have none). I simply placed the printed cards (on paper) into a sleeve with a Magic card to make it firm and less vulnerable to breaking while shuffling/dealing/etc.

If the card-backs are significant (they weren't for me), you could print them out too and place them in the other side of the sleeve, but honestly that sounds like a lot of work. For instance, if there are two types of card, you could put some Magic cards in backwards, or use different CCGs, or different colours of Magic card.

Not particularly high-quality, but considering the cost is the cost of printing a dozen sheets of paper and about a quid for the sleeves, it's prototype-gaming on a budget!