## anonymous one year ago for the simple harmonic motion equation d=9 cos(pi/2t) what is the period?

1. anonymous

is it 1?

2. misty1212

HI!!

3. misty1212

period of $$\cos(bx)$$ is $\frac{2\pi}{b}$

4. misty1212

so no, it is not one

5. anonymous

so 2pi/b?

6. misty1212

lol no dear, you need a number out of this in your case $$b=\frac{\pi}{2}$$ so divide $$2\pi$$ by $$\frac{\pi}{2}$$

7. anonymous

4?

8. misty1212

yes four !

9. anonymous

So then 4 would be the period?

10. misty1212

yes 4 would be the period

11. anonymous

Thank you!:)

12. misty1212

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