Oh god Pyramid of Death

[sajib_mostofa]

Would I lose marks if I converted the answer to degrees?

[charsiuvce]

Would I lose marks if I converted the answer to degrees?

as long as you didn't do any calculus with degrees i cant see why that would be wrong.

[Blakhitman]

did you guys get x=0.9554317??

and can anyone remember the equation of the volume?

was it

[3Xamz]

It was that, but 4000 not 400?

[3Xamz]

did you guys get x=0.9554317??

and can anyone remember the equation of the volume?

was it

PS: They asked for exact values, which was 4000sqrt(3)/27 which is ~ 0.9554317

[footywiz]

lol my methods teacher put in Victoria Jones in my 1st methods sac this year. Should've taken the hint...

[Blakhitman]

It was that, but 4000 not 400?

ahhh shit, gg -.-

did you guys get x=0.9554317??

and can anyone remember the equation of the volume?

was it

PS: They asked for exact values, which was 4000sqrt(3)/27 which is ~ 0.9554317

Yea I did put cos^-1(blah).

And that was the volume ^

[3Xamz]

Yea I did put cos^-1(blah).

And that was the volume ^

Sweet as
cos^-1(1/root(3))?

[InitialDRulz]

yeah i got that as my x co-ordinate :x

[homedog]

hey question for all those people who got 4000 root 3 divided by 27 for this question, what calculator were you using???

[becca92]

ti89

[Whatlol]

you shoulda seen the answer the class pad pulled out.

[3Xamz]

Classpad 330 for moi.

EDIT: However, the best method was to;

Find the derivative, let the numerator equal zero.
This lead to cos^2(x) = 1/3

Sub that into the volume equation to get; (4000/3)* sqrt[(1/9) - (2/27)]
NOTE: cos^4(x) = (cos^2(x))^2 = (1/3)^2 = 1/9. Much easier than isolating x and subbing back in, same for cos^6(x).

At this step did I use the calculator for the first time, simplifying the above term gave 4000sqrt(3)/27

[stonecold]

My calc was being gay, and it finally gave me this answer in like the last 3 mins...

[homedog]

you shoulda seen the answer the class pad pulled out.

were u using classpad 330 because i got no solution. + no one in our school got it and we all use classpad 330, not even the teacher, so i'm think that there might have been a calculator issue on the classpad with this question