# Thread: Sine to cosine shift

1. ## Sine to cosine shift

Explain how y = 4sinθ can be written as a cosine function.

Thanks for any help!

2. I'm not exactly sure how you want it, but...

Therefore, you could write y = 4sinθ as y = 4cos((pi/2)-θ)

3. Originally Posted by XanthanPower
I'm not exactly sure how you want it, but...

Therefore, you could write y = 4sinθ as y = 4cos((pi/2)-θ)

Thanks for the help