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Hey guys, So in prelim today we had a question to show: sin^2 (5x) - sin^2 (3x) = sin(8x) . sin(2x) What I did was pretty much prove sum to product formula and then used it. But seeing as it's not in the syllabus, how would someone do this within the confines of the 3U syllabus? What...

Hi guys, anyone know where I can find hard perms and combs questions, preferably with solutions? or should I just scour through ruse papers again sigh

Hey guys, so currently I'm doing Adv English 3u Maths (picking up 4u) Physics Chemistry Economics Computing 1u (dropping) I feel that conceptually, my weakest 2 subjects are eco and chem. For chem I'm ranking top 10 out of pure luck, and for eco I'm in top 30, but I've been procrastinating a...

Can someone help me with parts d) and e)? The booklet that has this question says that d) is x= (2R^2 g) / (2Rg-u^2) and that e) is u=11200 m/s, but I have no idea on how to get to any of those answers