I need help with my maths.

http://mathbin.net/7351

Free blowjays for everyone who helps me!

Apply the cosine sum/difference formula under "Angle sum and difference identities" at http://en.wikipedia.org/wiki/List_of_trigonometric_identities

I've got most of it done now, but I can't figure out how to get I_0.

Never mind, I figured it out. Thanks.

>>1
>I need help with my maths.
>my maths.
>maths.
RRRRRRRRRRRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGGGGGGGGGGGGGGGGGGGGEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!!

>>5
I RAGE AT YOUR RAGE YOU AMERICAN PIG DOG

Hey /sci/. I need help because I smoked too much pot in high school.

A car traveling 15 m/s speeds up to 25 m/s in 125 m. How much time does it take the car to do this?

A certain automobile manufacturer claims that its sports car will accelerate uniformly from rest to a speed of 27 m/s in 8.0 seconds. What is the acceleration of the car? How far does the car travel during this time?

A car traveling 15 m/s speeds up to 25 m/s in 125 m. How much time does it take the car to do this?

Is unsolvable because there is no mention of jerk.

The latter involves less work, so dealing with that, acceleration is change in velocity divided by change in time, so 27m/8s^2 or 3.375m/s^2.  For distance traveled, you'll rely on the handy formula

Distance = Initial Velocity x Time + 1/2 x Acceleration x Time^2;

d = 0m/s x 8s + 1/2 x (27m/8s^2) x (8s)^2 =
= 0 + 1/2 x 27m x 8 = 27m x 4 = 108m.

For the first problem, assuming uniform acceleration, it requires the same distance formula, only the acceleration can't simply be plugged in.  But the distance formula can be thought of as

Distance = Initial Velocity x Time + 1/2 x (Acceleration x Time) x Time,

and finding out Acceleration x Time is easy enough with the formula

Initial Velocity + Acceleration x Time = Final Velocity,

15m/s + Acceleration x Time = 25m/s
Acceleration x Time = 10m/s

Plugging everything known into the distance formula yields

125m = 15m/s x Time + 1/2 x 10m/s x Time
125m = 15m/s x Time + 5m/s x Time
125m = 20m/s x Time
6.25 s = Time

YOur wrong mother fucker

>>10
Easy said. Explain why his position is wrong and maybe someone will believe your point.

>>11
You misunderstand, he said "YOur wrong mother fuck", not "you're wrong mother fucker"

Boy, I do wish Shiitchan had a permasage function.