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ur silly

$1. Let the circumference of the circle be x and the perimeter, P, of the square be 10 - x$ \therefore 2\pi r = x ~ , ~ P = 10 - x r = \frac{x}{2\pi} ~ , ~ s = \frac{10 - x}{4} ~ $where s is the side length of the square$ \therefore A_c = \pi \times (\frac{x}{2\pi})^2 ~ , ~ A_s = \frac{(10 -...

No problem, glad i helped

:O Really. I've always used $ $ to type text. testing~1~2~3~$although this looks nicer$

For the first one, apply double angle formula to the top so sin2x=2sinxcosx. Then use the substitution let u = sinx For the second one, write it as cosx/sinx and notice the numerator is the derivative of the denominator.

Try this site for information on chemistry related careers. http://www.raci.org.au/

I haven't bothered to put one up haha. I thought you had one?

Make sure the link ends in .png, .jpg, .jpeg or .bmp etc.

Easy tests or smart students.

lol guys. Follow this template:

Give it a shot and post back how it goes :)

Hints for both: Perfect square 0 = a - a

Timske, the question says that the $5000 is invested at the end of each year. So after 10 years (at the end of the 10th year), the school would have invested $5000 but this wouldn't gain any interest. Demento1, that's a nicer way to write it when explaining it but i thought the OP would...

You included another years worth of investment. It's best to set out your working like below so you don't make any mistakes (don't remember formulae!) $Let P be the total investment at the end of each year$ P_1 = 5000 P_2 = 5000(1.06) + 5000 P_3 = (5000(1.06) + 5000)(1.06) + 5000 =...

L_v = L_o\sqrt{1 - \frac{v^2}{c^2}} where Lv is relativistic length and Lo is proper length.

Length contraction: v -> c, length of object in direction of motion -> 0

6 hours 15 minutes for the tide to move from low to high. 6 hours 15 minutes for the tide to move back from high to low. 1 period = 6hrs 15 mins times 2 = 12 hrs 30 mins or 12.5 hrs.

Use sin^2\theta + cos^2\theta = 1, cosec^2\theta - cot^2\theta = 1 and sec^2\theta - tan^2\theta = 1 extensively.

No. It covers these 12 topics: Geometrical Applications of Calculus, Integration, Exponential and Logarithmic functions, Trigonometric functions, Inverse functions, Induction, Combinatorics, Binomial Theorem, Applications of Calculus in the Physical World, Polynomials, Circle Geometry and...

only a very select few know who i am. (you, jnney, spiral) they've been alrite, haven't been able to get much school work done lol. no, that person doesn't know LOL. send me your plan >:]