Has anyone completed the C3 specimen paper? I'm stuck on questions 6(f) and 7 because the mark scheme doesn't show the full working out. Please help! Thanks.
Post the question and your attempt at answering it, and then more people (e.g. me) will be able to help than just the few who have the C3 Edexcel specimen paper.
For 6f, I've not read through the question but I believe it's telling you - from my glance - that dtdT=−1.8 you've already found dtdT for part e, so just set it equal to -1.8 and solve for little t. Then, sub back into your equation and solve for big T.
Thanks everyone! I definitely understand 6(f) and 7(i)(ii) now! But I'm still unsure about 7(iii) I don't understand how you got the values of R cos(alpha) and R sin(alpha).