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NS (Pre-Calc Help) Preeeez karmaz

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WaterBottle
Posts: 1156 - Karma: 4
I have a test tommorow over: Vectors, Parametrics, Projectile Motion, Polar Functions (coordinates & Equations), Trig Form of Complex #'s.

my question is are there any tricks or hints i could use to remember things while i study?

thankyou, +k for any good responses
Nov 14 2010 7:54PM
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Waldo-
Posts: 1026 - Karma: 184
Just study it. If you learn it then you can work with it. Tricks are empty ways to memorize
Nov 14 2010 8:06PM
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Anathema
Posts: 21048 - Karma: 5,061

Projectile Motion

horizontal component: vx = dx/t , where dx is the change in distance in the x direction, vx is the x component of the velocity of the projectile.

vertical component: dy = vy*t - .5gt^2 , where dy is the change in distance in the y direction, vy is the y component of the velocity, and g is the acceleration of gravity.

in both cases, t = time  the projectile spends in the air and it is the same in both the x and y directions, as the time taken for the projectile to travel along the ground is intuitively going to be the same amount of time it spends in the air.

vy = vsin(angle) and vx = vcos(angle) , provided the angle was given between the horizontal plane and the trajectory of the projectile.

Nov 14 2010 8:11PM
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Gnarcoma
Posts: 437 - Karma: 5
Study?  I never once had to study in Pre-calc; it was the easiest math class I've ever taken.  You are a complete idiot for needing to study. 
Nov 14 2010 8:13PM
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wisconsinsteeze
Posts: 1170 - Karma: 749
i wish i had your teacher then, pre-calc sucked ass!

but i'm assuming that you have a graphing calculator, so go to your programs and type some notes in!
Nov 14 2010 8:15PM
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Rob.
Posts: 189 - Karma: 16
Get a good calculator. Some scientific calculators have a mode for complex numbers. Graphing calculators will pretty much do it all.

Learning it will help the most. Do practice problems if you don't get something.
Nov 14 2010 8:18PM
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WaterBottle
Posts: 1156 - Karma: 4
im a sophomorein high school and this class bens me over and fucks me in the asshole
Nov 14 2010 8:44PM
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