PLEASE SOLVE AND GIVE CORRECT ANSWER
Question 63 of 90
The value of  0 π / 2 sin   x sin   x + cos   x   d x is
1. p/2
2. p/3
3. π /4
4. p

Let I = 0π/2 sin xsin x + cos xdx    .....1I = 0π/2 sinπ2 - xsinπ2-x + cosπ2-xdxI = 0π/2cos xcos x + sin x dx    ......2Adding 1 and 2, we get2I = 0π/2 sin x + cos xsin x + cos xdx2I = 0π/2 dx2I = x0π/22I = π2I = π4

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