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Mathematics 10 Online
OpenStudy (anonymous):

thanks

OpenStudy (solomonzelman):

switch y and x, and solve for y.

OpenStudy (solomonzelman):

\(\large\color{slate}{ y=1/2~\sin x }\) switch \(\large\color{slate}{ y}\) and \(\large\color{slate}{ x }\). What do you get after doing so?

OpenStudy (anonymous):

x=1/2 sin y ?

OpenStudy (solomonzelman):

yes.

OpenStudy (solomonzelman):

Now, multiply both sides times 2 for me please.

OpenStudy (anonymous):

idk wait like what 2/4

OpenStudy (solomonzelman):

\(\large\color{slate}{ x=1/2~\sin (y)~}\) multiplying both sides times 2 , \(\large\color{slate}{ x\color{blue}{\cdot 2}=1/2~\sin (y)~\color{blue}{\cdot 2} }\) What do you get then?

OpenStudy (solomonzelman):

(what cancels out on the right side ?)

OpenStudy (anonymous):

2x=sin(y)?

OpenStudy (solomonzelman):

yes.

OpenStudy (solomonzelman):

now, we know that: If: \(\large\color{slate}{ \rm{sin{\small~}}(\color{blue}{A})=\color{red}{B} }\) Then: \(\large\color{slate}{ \rm{Arc{\tiny~}sin{\small~}}(\color{red}{B})=\color{blue}{A} }\)

OpenStudy (solomonzelman):

And so, If: \(\large\color{slate}{ \rm{sin{\small~}}(\color{blue}{y})=\color{red}{2x} }\) Then: \(\large\color{slate}{ \rm{Arc{\tiny~}sin{\small~}}(\color{red}{~?~})=\color{blue}{y} }\)

OpenStudy (anonymous):

2

OpenStudy (solomonzelman):

2 ?

OpenStudy (solomonzelman):

it would be arcsin(2) ??

OpenStudy (solomonzelman):

or did you mean something else?

OpenStudy (anonymous):

y=2 arcsin x?

OpenStudy (solomonzelman):

Again the rule is: ~~~~~~~~~~~~~~~~~~~~~~ If: \(\large\color{slate}{ \rm{sin{\small~}}(\color{blue}{A})=\color{red}{B} }\) Then: \(\large\color{slate}{ \rm{Arc{\tiny~}sin{\small~}}(\color{red}{B})=\color{blue}{A} }\)

OpenStudy (solomonzelman):

~~~~~~~~~~~~~~~~~~~~~~ If: \(\large\color{slate}{ \rm{sin{\small~}}(\color{blue}{y})=\color{red}{2x} }\) ~~~~~~~~~~~~~~~~~~~~~~ your \(\large\color{slate}{ \rm{{\small~}}\color{blue}{A} }\) is y . your \(\large\color{slate}{ \rm{{\small~}}\color{red}{B} }\) is 2x .

OpenStudy (anonymous):

wait so y=arcsin2x

OpenStudy (solomonzelman):

yes, \(\large\color{slate}{ y={\rm Arcsin}(2x) }\)

OpenStudy (solomonzelman):

\(\large\color{slate}{ \color{blue}{y}={\rm Arcsin}(\color{red}{2x}) }\) see the A and B thingy here?

OpenStudy (anonymous):

yes i do thanks so much

OpenStudy (solomonzelman):

You welcome!

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