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1)

 The area bounded by the curves y= cos x and y= sin x between the ordinates x=0 and   x=3π2  is


A) (422) sq.units

B) (42+2) sq.units

C) (421) sq.units

D) (42+1) sq. units

Answer:

Option A

Explanation:

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 Required area 

π40(cosxsinx)dx+5π/4π/4(sinxcosx)dx

                                                                    3π/25π/4(cosxsinx)dx

=[sinx+cosx]π/40+[cosxsinx]5π/4π/4+[sinx+cosx]3π/45x/4

=  (422) sq.units