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Statement I- The area of the curve y=sin...

Statement I- The area of the curve `y=sin^2 x "from" 0 "to" pi` will be more than that of the curve `y=sin x "from" 0 "to" pi`.
Statement II -`x^(2)gtx, if xgt1`.

A

Statement I is true, Statement II is also true, Statement II is the correct explanation of Statement I.

B

Statement I is true, Statement II is also true, Statement II is not the correct explanation of Statement I.

C

Statement I is true , Statement II is false

D

Statement I is false , Statement II is true

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze both statements one by one. ### Step 1: Analyze Statement I We need to compare the areas under the curves \( y = \sin^2 x \) and \( y = \sin x \) from \( x = 0 \) to \( x = \pi \). 1. **Area under \( y = \sin^2 x \)**: \[ A_1 = \int_0^\pi \sin^2 x \, dx \] We can use the identity \( \sin^2 x = \frac{1 - \cos(2x)}{2} \): \[ A_1 = \int_0^\pi \frac{1 - \cos(2x)}{2} \, dx = \frac{1}{2} \left[ x - \frac{\sin(2x)}{2} \right]_0^\pi \] Evaluating this: \[ A_1 = \frac{1}{2} \left[ \pi - 0 \right] = \frac{\pi}{2} \] 2. **Area under \( y = \sin x \)**: \[ A_2 = \int_0^\pi \sin x \, dx \] Evaluating this integral: \[ A_2 = \left[ -\cos x \right]_0^\pi = -\cos(\pi) - (-\cos(0)) = 1 + 1 = 2 \] 3. **Comparison**: Now we compare \( A_1 \) and \( A_2 \): \[ A_1 = \frac{\pi}{2} \quad \text{and} \quad A_2 = 2 \] Since \( \frac{\pi}{2} \approx 1.57 < 2 \), we conclude: \[ A_1 < A_2 \] Thus, Statement I is **False**. ### Step 2: Analyze Statement II We need to check if \( x^2 > x \) for \( x > 1 \). 1. **Rearranging the inequality**: \[ x^2 - x > 0 \implies x(x - 1) > 0 \] The product \( x(x - 1) \) is positive when both factors are positive or both are negative. 2. **Finding the intervals**: - For \( x > 1 \): Both \( x > 0 \) and \( x - 1 > 0 \) are true, hence \( x(x - 1) > 0 \). Thus, Statement II is **True**. ### Conclusion - Statement I is **False**. - Statement II is **True**. The correct answer is that Statement I is False and Statement II is True.
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