MAT 2011 Q why do they divide by 2 here?

[potent scaffold]

is the answer b or a?

[wary hemlock]

Yh b

[wary hemlock]

The working out is on the ss

From r2 but I don’t get why when he got 13/12 he /by 2

[potent scaffold]

Hmm not sure either

Ohh wait

It might be cause of 2x

Sin2x

Since they changed the range I think they divided it by 2 at the end

It might be that but not certain

[wary hemlock]

i thought that too but i why not do 1/3 /2 then plus it to 3/4

[unborn nexus]

To get the fraction of the range of 2pi

[potent scaffold]

than i might be wrong

[wary hemlock]

wym

[unborn nexus]

It asks for the fraction of the interval of 0 to 2pi

It’s true over a total range of 13/12pi

Hence the fraction is 13/12 pi divided by 2 pi

[wary hemlock]

wym by this

[cosmic pecan]

love

Ibrahimovic

It’s cuz ur finding the fraction of the total interval