Quick Question (1 Viewer)

[Fadee]

Ok i just need to check something with you guys

Exercises 17(g) of the New Senior Mathematics 2U book by J.B Fitzpatrick
Question 21.

No matter what i do, i never get the same answer as the back.

So can someone please give me their answer, i keep getting 1.

Here's the question:



That's supposed to be pi btw. :|

couldn't find any other symbol.

 

[thongetsu]

when you integrate cos1/2x you get 2sinx/2

sub in pi and pi/3 gives

2sinpi/2 - 2sinpi/6

= 2 - 1

= 1

 

[Fadee]

when you integrate cos1/2x you get 2sinx/2

sub in pi and pi/3 gives

2sinpi/2 - 2sinpi/6

= 2 - 1

= 1

yeah, that's what i keep getting, but the answer in the back is negative root 3

 

[thongetsu]

lol dude you're such a noob xD

you're looking at Q20 answer

 

[Fadee]

lol dude you're such a noob xD

you're looking at Q20 answer

Question 21,

and now look at the answer:

 

[thongetsu]

ROFL DUDE

im looking at my book right now and mine says 21. 1

LOL i think yours is some dodgy copy. Refund!

 

[Fadee]

ROFL DUDE

im looking at my book right now and mine says 21. 1

LOL i think yours is some dodgy copy. Refund!

ROFL

School gave it for free !

 

[thongetsu]

ahaha no wonder!

 

[thongetsu]

my book says 1 though. I bought mine.

 

[Fadee]

my book says 1 though. I bought mine.

LOL !

Mine is free = wrong answers

yours is bought = right answers

conspiracy !

I woulda failed my hsc !

 

[thongetsu]

haha schools probably buy cheap rip offs

 

[hscishard]

1 is corerect.

The answers in the first version of Fitz is a bit choppy. The new one is just a bit better.