Question

how is the graph y=5sin2x related to y=sinx?

Answer 1

First let's think about the period of this function (the length you have to complete one cycle)

Answer 2

second let's think about amplitude...

Answer 3

Amplitude is easy...the sine function is bounded between -1 and 1...
this function we have is bounded between -5 and 5 so our sine function is stretched...

Answer 4

i'll send a drawing from my phone...one minute

Answer 5

does it make sense?

Answer 6

yes thanks for your help

Answer 7

you are welcome :-)

Answer 8

do you mind helping me out with another problem?