Originally Posted by
explodingtoenails I'll give my best go at it...
Uh 19 is half of 38, so it would go up 19 and down 19. Would it matter if it was -19 or positive 19?
in this case, -19, because the graph of motion in a cosine curve reflected over the t-axis
Also, why is it cosine instead of sine? Would it matter since they are just the same graph with different translations?
easier to use cosine in this case ... no horizontal shift is necessary
2pi is one revolution, times t number of seconds, and it's divided by 15 because a revolution happens every 15 seconds.
that's right