Recent content by minia2353

Homework Statement prove: if f(x) bigger or the same as 0 on an interval I and if f(x) has a maximum value on I at x0(0 is written small beside the x), then sqrt of f(x) also has a maxsimum value at x0. Similarily for minimum values. Hint: Use the fact that sqrt of x is an increasing...

the equation is up to now is: dp= (1/115) (cos^2 cos^-1 (115/ sqrt (h^2+ 115^2) ) dh)

The equation you understood it as is not what I meant, I'm sorry for the error. It's 115/ sqrt (h^2+ 115^2)

another error??

I forgot to place cos^-1 in front of 115/√h^2 + 115^2 and the 115^2 goes under the sign with h^2 as well.

Then would it be this ; simplified + cos^-1 : dp=( 1/115 ) (cos^2 (115/(√h^2 + 115^2)dh)

does it become this? dp= dh/115sec^2tan^-1 (h/115)

Yes, I konw the triangle but I still can't get at it. It seems like a simple one but I don't seem to know something to get at it.

It's the 2nd part of your step I'm stuck on.

I know that I need to get that equation and I've tried but I don't seem to get it. That's where I need help.

Homework Statement the base of the great pyramid giza is a square that is 230m on each side. use differentials to estimate the allowable error in the elevation angle that will ensure that the error in calculating the height is at most +,- 5m. phi is the elevation angle of the pyramid. h=...

I really don't understand... can you explain the step more thoroughly??

can someone please help me solve this problem? let C be a flow line for F(x,y) = -yi+xj, and let (x,y) be a point on C for which y is not 0. Show that the flow lines satisfy the differential equation dy/dx= -x/y.