Question

Help! I think it's either B or C, and I'm more leaned to C. Is this correct?

http://oi57.tinypic.com/m7swo5.jpg

Answer 1

yes

Answer 2

Is there anyway you can explain why its pi/2 instead of 4 after Sin?

Answer 3

not C

Answer 4

Trust hartnn...He's going to get you there.

Answer 5

\(for ~ y=A\sin (wt)\)
period = \(\dfrac{2\pi}{w}\)

Answer 6

\(\pi/2 = 2\pi /w \)

find w

Answer 7

So its B, W = 4?

Answer 8

YES

Answer 9

Yes sorry i got that wrong

Answer 10

Thank you both! And its ok cw, thanks for helping =)