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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Mathematics
Chapter
Inverse Trigonometric Functions

NTA Abhyas 2020 · Mathematics · Inverse Trigonometric Functions

The minimum value of x which satisfies the inequality si n ^ - 1 x...

The minimum value of xx which satisfies the inequality sin−1x≥cos−1xsi{n}^{- 1}x \ge co{s}^{- 1}x is λ\lambda, then the value of 2λ2\lambda is (use 2=1.41\sqrt{2} = 1.41)The minimum value of x which satisfies the inequality si n ^ - 1 x ≥ co s ^ - 1 x is λ , then the value of 2λ is (use 2

Correct answer

1.41

Step-by-step solution

The minimum value of x which satisfies the inequality si n ^ - 1 x ≥ co s ^ - 1 x is λ , then the value of 2λ is (use 2
Using the graphs of sin−1xsi{n}^{- 1}x & cos−1xco{s}^{- 1}x, we can see that
sin−1x≥cos−1xsi{n}^{- 1}x \ge co{s}^{- 1}x for x∈[12,1]x \in \left[\dfrac{1}{\sqrt{2}}, 1\right]
So, the minimum value of xx is λ=12\lambda = \dfrac{1}{\sqrt{2}}

Hence, 2λ=22\lambda = \sqrt{2}

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