SOME QUESTIONS ON DIFFERENTIABILITY

• Find the point on the curve y = 2x² – 6x – 4 at which the tangent is parallel to the x – axis
• Find the slope of tangent for y = tan x + sec x at x = π/4
• For the curve y = 3x² + 4x, find the slope of the tangent to the curve at the point x = -2.
• Find a point on the curve y = x² – 4x -32 at which tangent is parallel to x-axis.
• Find a, for which f(x) = a(x+sinx)+a is increasing .
• The side of a square is increasing at 4 cm/minute. At what rate is the area increasing when the side is 8 cm long?
• Find the point on the curve y =x²-7x+12, where the tangent is parallel to x-axis.

C++ program to illustrate passing of structures by value.

Write a C++ program to illustrate passing of structures by value. 

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
struct distance{
 int feet;
 int inches;
};
int main()
{
clrscr();
    distance length1, length2;
void prnsum(distance l1, distance l2);
cout<<"\n"<<"Enter length 1:\n";
cout<<"\n"<<"Feet:\n";
cin>>length1.feet;
cout<<"\n"<<"Inches:\n";
cin>>length1.inches;
cout<<"\n"<<"\n"<<"Enter length 2:\n";
cout<<"\n"<<"Feet:\n";
cin>>length2.feet;
cout<<"\n"<<"Inches\n";
cin>>length2.inches;
prnsum(length1, length2);
return 0;
}
void prnsum(distance  l1, distance l2)
{
  distance l3;
  l3.feet = l1.feet + l2.feet + (l1.inches +l2.inches)/12;
  l3.inches =( l1.inches + l2.inches)%12;
  cout<<"\n"<<"\n";
  cout<<"\n"<<"Total Feet:"<<l3.feet<<"\n";
  cout<<"\n"<<"Total Inches:"<<l3.inches;
  return;
}
/*
OUTPUT
------

Enter length 1:

Feet:
10

Inches:
1

Enter length 2:

Feet:
12

Inches
2

Total Feet:22

Total Inches:3


*/

Are you stressed out?

Are you stressed out because of exams, school and tests?! 

These tips might help you overcome your stress :) 

1.Have a test tomorrow and haven't touched your books yet?!

•    Step 1: STOP PANICKING! (no point panicking now. We have already committed the mistake)
•    Step 2: Don't waste the time you have in hand RIGHT NOW. 
•    Step 3: Start off immediately and study as much as you can.
•    Step 4: Start the next day afresh and give your test with confidence. 

2.Are all your class lessons going over your head?!

•    Step 1: STOP PANICKING! 
•    Step 2: Dedicate a weekend (or more depending on much you are lagging behind/ how high over your head the lessons are going!) for your studies. Revise all your lessons. 
•    Step 3: Get ready to kick off the next week with the 'new and improved' you!

3. Do you feel overloaded?!

• Make sure you have some 'YOU-time' everyday.
• Don't miss out on doing things you enjoy.
• Pursue your hobbies.
• Remember, its not only studies that matter. 

4. What does your plate have to say about you?!

• Avoid junk food.
• Healthy food => Healthy Body & Healthy Brain. 

5. Cluttered desk = Cluttered mind. 

• Get organized. 
• All it takes is a simple rule ''Put things back to where they belong."
• Collect one-sided papers and reuse them.
• Give away your old school books to your friend who may need it or for charity.
• Discard materials that can no longer be used.

6. Are you getting enough sleep?

• Don't sacrifice your sleep! 
• Make sure you get at least 7 hours of good night's sleep.

GOOD LUCK! 

*results may vary :P

CBSE SAMPLE PAPERS 2012

Click the links below to view.

• Maths
• Physics
• Chemistry
• Biology
• Computer Science