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Mentality A, line 3: 1- 1/2 is 1/2. Not -1/2? Same for Mentality B, line 4. 1 + (-1/2) = 1 - 1/2 = 1/2 You did it right when you were answering the question at the beginning. Just though I'd let you know, might become confusing.

If you rationalise the denominator, you will get (sqrt2)/8. Is that what you're trying to get?

Try using the quotient rule. That's what I used without simplifying it, and I got sqrt(2)/8.

You're welcome (:

Okay, I'm going to write ^ instead of angle. Firstly: ^AXB = ^DYC (corresponding <'s of congruent triangles) Let <AXB = x and ^DYC = x ^AXC = 180 - ^AXB (supplementary ^'s) = 180 - x ^AYC = 180 - ^DYC (supplementary ^'s) = 180 - x Therefore: ^AYC = ^AXC = 180 -x Secondly...

And you're welcome.

a) That's right, but you have to write the reason at the end. Why is it congruent? Is AAA, AAS, SAS? Well, in this case it's SAS. Other than that, a is fine. b) That's right. You don't ave to add anything else. c) Okay, here you have to prove that angle YAX = angle YCX, and angle AXC = angle...

Yep, that's right.

Yep, you're right. But after the bold part, you can write something like " therefore triangle ADE is isosceles because it has two equal sides, and the angles opposite these sides (the base angles) are equal."

Try doing 2/3 papers with your notes so you can write proper answers for those 3+ mark questions. And the papers after that, do them without your notes.

Yeap, but remember to write your essay concept by concept, not text by text.

Yeah but it takes longer to differentiate, because you have to use both the chain rule and product rule. Using the chain rule without expanding is faster.

What's your working out for 1 and 3?

For 1 and 3, I wasn't giving you the answers, just examples.

1. Use the chain rule. Bring the power down, subtract 1 from the power. Differentiate what's inside the brackets, and multiply the whole equation by it. y = (sinx)^3 y' = 3(sinx)^2(cosx) = 3sin^2xcosx 2. If you have y = tan(2x), then dy/dx would be 2sec^2(2x). Differentiate what's inside...

Title of Experiment: short title of what your experiment is e.g. Effect of Substrate Concentration on the Enzyme Activity Aim: State what are you are investigating Hypothesis (optional): Your prediction of how one variable will affect another (how the independent variable will affect the...