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y -अक्ष ` y = cos x ` एवं ` y = sinx, 0 le x le (pi)/(2) ` से घिरे क्षेत्र का क्षेत्रफल है :

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y -अक्ष ` y = cos x ` एवं ` y = sinx, 0 le x le (pi)/(2) ` से घिरे क्षेत्र का क्षेत्रफल है :
A. `2(sqrt2- 1 ) `
B. `sqrt2 - 1 `
C. `sqrt2 + 1 `
D. ` sqrt 2 `
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Correct Answer - B
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