Hi, I'm having a spot of trouble. I'm trying to do an exercise (cus I have a maths test tomorrow) and I can't figure this out. A = cos (PI/3) - cos(2 PI/3) - cos (4 PI/3) + cos (5 PI/3) = 2 Why would that equal two? And what am I supposed to be subtracting and adding here? Value such as...

25cm3 of a commercial bleach NAOCl is diluted to 250 cm3 . A 25 cm3 of the diluted solution is added to an excess of potassium iodide solution and titrated against 0.200 M sodium thiosulphate solution. The volume used was 18.5 cm3. What I s the concentration of sodium chlorate in the bleach in mol...

I am considering a major expansion of a product line hand and have estimated the following free cash flows associated with such an expansion. The initial outlay associated with the expansion would be $1,950,000, and the project would generate from cash flows of $450,000 per year for six years. The...

I wanted to know how you take a total that already includes 6% gst and find out exactly how much gst was paid? Example: 45.00 includes 6% Gst-how much of the $45.00 is actually GST?:confused: Please show calculation. Thanks!