Hi,

I'd like to calcul the traject for

my bullet but I've a trigonometric problem

and it's so far for me, about 4 years ...

Here's my example :

I've a vector who begins at X, Y ==> (0,0)

His length is : 10

On the example, if the angle is equal to 0°,

the vector's direction will be X,Y ==> (0,10).

But my question is, where will be the vector

if the angle equals 30° ???

So, I must consider this :

- The angle

- The lenght of my vector

What's the formul for calculating this ?

It's possible to apply this formule

with a example. I'm gonna take this example.

1)

- The anle = 0°

- The vector's lenght = 10

2)

- The angle = 90°

- The vector's lenght = 10

==> In this case, X will be equal to - 10 and Y to 0