JEE Mains Model Paper 21

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Question : 79 of 90
 
Marks: +1, -0
Let Δ (x) =
|
cos2xcosxsinx−sinx
cosxsinxsin2xcosx
sinx−cosx0
|
then
π∕2
∫
0
(Δ(x) + Δ2(x)) dx equal to
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