Thursday, 7 June 2012

The End of Our Chemistry....


To Chem students next year: Don`t be shy to ask questions if you don’t understand something. It may seem like everybody is breezing on threw but if you don`t get it, Stop! Trust me, it`s better to ask than receive a fail on your exam...
Oh Zen, How Zen will you be today... This year, Zen decided to shake us up and cause a world of hurt for us. Disappearing writing, Switching Slides, Cut off of audio.... So basically what I`m saying is that you may have some technical difficulties but don`t worry too much about it. Sure you might have to catch up but that`s life, it isn’t always perfect. Also, frankly it`s a good laugh sometimes.
To Mrs. Cule, you are an amazing teacher. You have helped us through the horrors like stoicheometry. You were my teacher last year too and you were great. We have you to thank for making us ready for the world of sciences. Thank you so much

A Shagadelic Night

Class of 2012
My Escort, Gilmour and I
Me
My family and I
FUN FUN FUN FUN!


Friday, 25 May 2012

Tuesday, 10 April 2012

Traditional Activity

Please click HERE for a video that I made about one of our traditional activities. Hope you like it :)

Thursday, 5 April 2012

Exact Values

P.139 in SOFT COVER
2) If cosx=1/8 and x E [0, π], determine the value of

a) sinx

b) tanx

c) secx

d) cosecx

First we acknowledge that the angle is in the 1st quadrant. Therefore sin is positive. X in the book is theta here in this postBTW

a) sinѳ=±√1-cos²ѳ
=±√1-(1/8)²
=±√1-(1/64)
=±√(64/64)-(1/64)
=±√(63/64)

This is where it gets tricky

Sinѳ=(√63)/8

What 2 numbers make 63 put are also a perfect square?
9 and 7 soo...

Sinѳ=(√9X√7)/8

Sinѳ=(3√7)/8
Weird answer but correct.

2b) tanx. Really simple.

Tanѳ=sinѳ/cosѳ

Tanѳ= ((3√7)/8)/(1/8)
The two 8s cancel and we’re left with
Tanѳ=3√7

c)secx. Again, so simple. We take the reciprocal of cos so we get 8.

d) cosecx
cosecѳ=(8)X√7/(3√7)X√7
cosecѳ=8√7/21