Q.

For I(x)=sec2x2022sin2022xdx, if Iπ4=21011then,

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a

31011Iπ3Iπ6=0

b

31011Iπ6Iπ3=0

c

31010Iπ3Iπ6=0

d

31010Iπ6Iπ3=0

answer is A.

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Detailed Solution

Integration of sec²x and Solving for i(x)

 

Let's solve the given problem: 
For i(x) = ∫ sec²x - 2022 / sin²²x dx, if i(π/4) = 21011 then

 

Step 1: Understanding the Integral

The given function is:
i(x) = ∫ sec²x - 2022 / sin²²x dx
We need to simplify this using standard integration techniques.

 

Step 2: Breaking Down the Integration

The given expression can be separated as follows:
i(x) = ∫ sec²x ⋅ sin-2022x dx - 2022 ∫ sin-2022x dx
Using the known result for the integration of sec²x:

i(x) = tan x ⋅ (sin x)-2022 + ∫ (2022) tan x ⋅ (sin x)-2023 cos x dx - 2022 ∫ (sin x)-2022 dx

After integrating, we arrive at:
i(x) = (tan x) (sin x)-2022 + C

 

Step 3: Finding the Constant C

At x = π/4, the given condition states:
i(π/4) = 21011

Using the derived solution:
21011 = (1/√2)-2022 + C
Since (1/√2)-2022 = 21011, this gives C = 0.

 

Step 4: Final Form of i(x)

Therefore, the solution is:
i(x) = tan x (sin x)-2022

 

Step 5: Evaluating Specific Values

  • For i(π/6):
    i(π/6) = (1/√3) (1/2)-2022 = 22022/3
  • For i(π/3):
    i(π/3) = √3 (√3/2)-2022 = 22022 (3)2021 = (1/3) 1010

 

Step 6: Conclusion

Since i(π/6) = 3 × 1010 and i(π/3) = i(π/6), we confirm the derived solution is correct.

 

In conclusion, the solution showcases the steps to solve the given integral: i(x) = ∫ sec²x - 2022 / sin²²x dx and verifies the result for i(x) = tan x (sin x)-2022.

 

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