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Recent content by DudeWithoutName

  1. D

    Mathematics: Post your doubts here!

    Parts A and B are attached below
  2. D

    Mathematics: Post your doubts here!

    youre welcome :)
  3. D

    Mathematics: Post your doubts here!

    That the gradient is roughly constant over that period so the trapezium drawn will have one edge that follows the curve's edge making their areas very similar
  4. D

    Mathematics: Post your doubts here!

    Find the number of ways to arrange the digits 0,1,2,3,4,5,6,7,8,9 into 3 slots. That is 10P3=720 Now we need to take away all that starts with 0 because its less than 100 so we find the number of ways to arrange the digits 1,2,3,4,5,6,7,8,9 into the last 2 slots. This equals the number of...
  5. D

    Mathematics: Post your doubts here!

    "oops"
  6. D

    Mathematics: Post your doubts here!

    Which question?
  7. D

    Mathematics: Post your doubts here!

    Writing the second part in chat is far too tedious so i hope this picture is clear. Whats left is putting the two values of t into OC
  8. D

    Mathematics: Post your doubts here!

    The angle between the line and the plane can be thought of as 90-the angle between the normal and the line First we find the angle between the normal and the line: (i-3j+4k).(4i-j+5k)=sqrt(1^2+3^2+4^2)*sqrt(4^2+1^2+5^2)cos(theta) solve for theta theta=35.2 90-theta=54.8
  9. D

    Mathematics: Post your doubts here!

    Yes it can. Whats important is that you substitute 1.8 and 2.0 and show that the two values obtained have opposite signs meaning the root lies inbetween theme
  10. D

    Mathematics: Post your doubts here!

    Ok nevermind that. If you want a plane that is perpendicular to both, then the line of intersection of the two planes must act as a perpedicular to the third plane correct? basically want to find the equation of that line and then we can proceed from there. We have point A on the line with y...
  11. D

    Mathematics: Post your doubts here!

    Modulus of (z-u) being less than 2 is basically a circle with center u of radius 2 and the wanted region is whats inside the circle because its less than. Re z>2 means real part must be bigger than 2 so the x value of the complex number on the argand diagram must be greater than 2 so draw the...
  12. D

    Mathematics: Post your doubts here!

    Hey! First question, to find the angle between the two planes we can find the angle between the two normals. That is equal to the angle between the two planes. The first normal is i+j+3k and the second is 2i-2j+k. Using the dot product between these two we have...
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    Mathematics: Post your doubts here!

    no :D
  14. D

    Mathematics: Post your doubts here!

    Hmm, when it is on the point of slipping, the contact force will be on B, so if we take B as the pivot, we make the distance between the contact force and the pivot 0 hence cancelling its moment, right? So now it'll be much more convenient. We calculate the moment of the triangle and the...
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    Mathematics: Post your doubts here!

    Sure, if you want to calculate the moment of the normal component of the contact force about F then by using Moment=Force*Perpendicular distance of force from pivot=N*0=0Nm because if it acts at F, its distance from F is 0 (Hope that made sense)
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