Originally Posted by

**sjblencoe** No, I didn't expect a solution, just some help to find to find the solution myself. I thought my questions above were reasonable for someone with very little experience / knowledge in this field.

The formulas are fairly obvious but I am stumped with the "sin" and how to use it, with or without a scientific calculator (which I do have)

I only registered and posted on here as I thought someone might babysit me through the maths. Let me know if you can help me with my questions as above. If not I will need to try elsewhere and any pointers to a Math Help Site that could help would be appreciated.