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\frac{1+3i+9+3i}{2}= 5+3i

center is correct range of arg(z) 0<=arg(z)<=pi/2

for the Lolz LHS= \frac{1-\frac{2t}{1+t^2}}{\frac{1-t^2}{1+t^2}} =\frac{\frac{1+t^2-2t}{1+t^2}}{\frac{(1-t)(1+t)}{1+t^2}} =\frac{1+t^2-2t}{(1-t)(1+t)} =\frac{(t-1)^2}{-(t-1)(1+t)} =\frac{(t-1)}{-(1+t)} =\frac{(t-1)}{-(1+t)} =\frac{1}{2} \therefore -1-t=2t-2 3t=1 \therefore...

Re: them cityrail moments when i am bored and on the train, i take a picture of the train and then attempt to send it to people who have their bluetooth activated on the train... super funny when u see random people pulling their phones from their pockets AHAHAHA... and also, changing the blue...

there is no back EMF in any generator. if there is no supply EMF then what is the induced EMF going to go against. back EMF exist in a motor because you have a coil with a EMF in it causing it to spin. as it spins, the wire is cutting flux ( or there is a change in flux), so an EMF is induced...

gypo!

or u can do it this way: \int \frac{cosx}{sin^2x}.dx $let u =sinx du=cosx.dx \int \frac{1}{u^2}.du \frac{-1}{u} +c = -cosecx +c noobish i know but its just another way.

some dude from STHS... tristan?

take an honest go at the hsc. you don't want to be raging at urself in 5 years times saying " man... If only i studied that little bit more i could be in the careers of my dreams". no regrets:d

is it cause all the vectors cancel out?

hey, change ur sig... u just screwed up my day

no problem

(\sqrt{3+4i} +\sqrt{3-4i})^2 3+4i+3-4i+2\sqrt{(3-4i)(3+4i)} (upon exanding) 6+2\sqrt{25} = 16 i was going to find the square roots of the complex numbers lol

what time do we start tomorrow?

do we have physics this week?

how do i get the progress time to say "{length of movie played / length of movie}" not that it is important or anything but i would prefer it

u applying?

UNSW med applications are now open! GL

the two pictures show a wave that has changed over time... in the course of 0.5 seconds, only 0.25 of a wave. hence in one second.... 0.5 of the wave length has moved... thus the frequency is 0.5Hz. the period is given by 1/ƒ =1/.5=2seconds.. hence it takes 2 seconds for one wave to be completed

yo, signed up for UMAT today and filled in the expression of intrest.,... i can't believe that it is all become so real!!... i feel like orgasming.. taking my time with the big form for UNSW med... want to get it right. UWS med dosen't open till like september or something