What does this number mean? Which order of 1, 2, 3 and 4 makes the highest value? Which makes the lowest?
Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?
Can you find a way to prove the trig identities using a diagram?
What does the overlap of these two shapes look like? Try picturing it in your head and then use some cut-out shapes to test your prediction.
Manufacturers need to minimise the amount of material used to make their product. What is the best cross-section for a gutter?
