# 2 - Area bounded region, volume, surface area and are length Questions Answers

In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course? A. 6

B. 15

C. 24

D. 33

E. 54

**Asked By: RAJENDRA J LAVANTRA**6 year ago

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Find area of region bounded by the curve y=[sinx+cosx] between x=0 to x=2p.

**Asked By: KAMAL**7 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

[sinx + cosx] = [√2 sin{x+(π/4)}] here [ ] is greatest integer function

its value in different interval are

1 for 0 to π/2

0 for π/2 to 3π/4

-1 for 3π/4 to π

-2 for π to 3π/2

-1 for 3π/2 to 7π/4

0 for 7π/4 to 2π

now solve