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Find alpha where alpha is a real number. I made it a single fraction, realized the denominator, found Re and Im parts, then equated them to solve for alpha - but the solution always contained an i. The correct answer is alpha = -5. Please help

So I was talking to a uni student today and he told me that, rather getting tutored or attending a coaching college like Prior or Matrix, he got involved in this 'cooperative study group'. Basically, students applied by giving in their report cards and also doing a quick test. Then, the top 6...

Hey Guys, I appreciate that guides for this thing are already up. But I am in quite a unique position. And yes this applies directly to 4U. I am in Year 11. My current units are as follows: 2U Drama (I can rank 1 or 2) 2U English (rank 1) 1U English Ext...

Hey Guys, Can anybody help me out with this - its bloody annoying. Unless I'm missing something? (But I'm pretty sure I'm not.) $prove$ \frac{1+cosec^2 Atan^2 C}{1+cosec^2 Btan^2 C} = \frac{1+cot^2 Asin^2 C}{1 + cot^2 B sin^2 C} Thanks heaps (by the way its Cambridge Year 11/4F/16L)

So I'm pretty sure I've just bought a shit textbook, but can anyone explain the following questions (unless they are, as suspected, incorrect)? Thanks - I'd really appreciate it.

Hey, Can anyone help me out on this question? Its 13k in Exercise 2A of the Year 12 3U Cambridge Book. The question is as follows cos2A.cos2B-sin2A.sin2B=(cos2A+cos2B)/2 Can't get it! :confused2: Cheers