Let the maximum value of (sin^-1x)^2 + (cos^-1x)^2 for x in left[-fracsqrt32, frac1sqrt2right] be \frac{m}{n}\pi^{2}, where gcd(m, n) = 1. Then m + n is equal to ____.

Numerical Answer Type:
Enter a numerical value Answer: 65 to 65 +4 marks

Solution & Explanation

### Related Formula sin^-1x + cos^-1x = fracpi2 a^2 + b^2 = (a+b)^2 - 2ab ### Core Logic Let y = (sin^-1x)^2 + (cos^-1x)^2. y = (sin^-1x + cos^-1x)^2 - 2sin^-1x cos^-1x y = fracpi^24 - 2sin^-1x left(fracpi2 - sin^-1xright) y = 2(sin^-1x)^2 - pi sin^-1x + fracpi^24 Complete the square: y = 2left( sin^-1x - fracpi4 right)^2 - fracpi^28 + fracpi^24 = 2left( sin^-1x - fracpi4 right)^2 + fracpi^28 ### Step 1: Bound the Function Given domain x in left[ -fracsqrt32, frac1sqrt2 right]. The range of t = sin^-1x for this domain is left[ -fracpi3, fracpi4 right]. So the expression is f(t) = 2left( t - fracpi4 right)^2 + fracpi^28. ### Step 2: Find the Maximum The function f(t) is a downward-opening distance squared logic? No, leading coefficient is positive, it's an upward parabola. Max value occurs at the boundary furthest from the vertex t = fracpi4. The boundaries are -fracpi3 and fracpi4. The distance from -fracpi3 to fracpi4 is greatest. At t = -fracpi3: textMax = 2left( -fracpi3 - fracpi4 right)^2 + fracpi^28 = 2left( -frac7pi12 right)^2 + fracpi^28 = 2left( frac49pi^2144 right) + fracpi^28 = frac49pi^272 + frac9pi^272 = frac58pi^272 = frac29pi^236 ### Step 3: Calculate Required Value Here m = 29, n = 36. Check gcd(29, 36) = 1. m + n = 29 + 36 = 65. ### Pattern Recognition Expressions shaped like f(x)^2 + g(x)^2 where f(x)+g(x) = C will always map to a simple parabola. Analyze strictly based on vertex distance in the restricted f(x) domain bounds. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Maths: Inverse Trigonometric Functions Class 11 Maths: Quadratic Equations

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