Question

Help with sin please? Medal. @e.mccormick @jdoe0001 @mathmath333

Answer 1

looks very straightforward

Answer 2

ther are 4 spots on that graph, that the sine function hits 0
and is a pattern, so..... notice those spots

Answer 3

@jdoe0001 I'm thinking B, but the k's were confusing me...

Answer 4

@jim_thompson5910

Answer 5

they don't say it, but k is an integer

so for example, in choice A we have

\[\Large \theta = 2k\]

which means that theta is equal to 2*0, 2*1, 2*2, 2*3, etc Basically any number in the form 2*(whole number).

This notation is used to list the infinitely many solutions.

Answer 6

and pi*k is correct because pi*0 = 0 is a solution

so is pi*1 = pi

so is pi*2 = 2pi

etc etc

Answer 7

Oh! I see. So then B would be correct?

Answer 8

yes it would be

Answer 9

Thanks once again @jim_thompson5910 :)

Answer 10

np