Question

Is this correct?

Answer 1

Its correct

Answer 2

no its not

Answer 3

thats on. a different level of area

Answer 4

yes its just the are of the level

Answer 5

Shouldnt i put the point on pi because that the period ?

Answer 6

Yes You should
:)

Answer 7

?

Answer 8

\[at~\frac{ \pi }{ 2},\cos 2x=-1,-1+1=0,\]

Answer 9

and again\[at~\frac{ 3\pi }{ 2 },\cos ~2x=\cos~3\pi=-1,-1+1=0\]
so almost correct,slightly to the left on these points.

Answer 10

your curves should meet x-axis at \[\frac{ \pi }{ 2 }~and~\frac{ 3\pi }{ 2 }\]