1. The natural logarithm has a base:

2. 2cos(A + B / 2) sin (A - B / 2) is equal to:

3. The slope of the line passing through the points (4,2) and (-4,2) is:

4. If sin² + cos 2 =1 then:

5. d /dx (sina/cotx)

6. If x = (3 - 1) then x 2 =?

7. The slope of the line passing through the points (4,2) and (-4,2) is:

8. A function F (X) is maximum at X = C if:

9. The point (11,-3) is below or above the line x+2y+3=0:

10. The radius of a spherical balloon is estimated to be 20 cm with a minimum error of
0.1 cm in its measurement. Then minimum error in the surface area of the balloon is: