# Thread: Transformations

1. ## Transformations

Please help....

What kind of transformation is represented by sinx----> cosx?

Thank You in Advance

2. Think about the derivative : f(x) = sin x, f'(x) = cos x.

3. I haven't learned about derivative yet. This is math 12.

4. Hello ASD2010
Originally Posted by ASD2010
Please help....

What kind of transformation is represented by sinx----> cosx?

Thank You in Advance
Look at the graphs of $\sin x$ and $\cos x$, and you'll see that they're identical in shape, but $\cos x$ is shifted $90^o$ to the left. So the transformation is a translation parallel to the $\displaystyle x$-axis through $-90^o$.

Grandad

5. OKay, Thank you Very much. That helps alot