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if cos^-1(2/3x) = cos^-1(3/4x) = π/2 (x > 3/4) then x is equal to

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if cos-1(2/3x) = cos-1(3/4x) = π/2 (x > 3/4) then x is equal to

(1)  √145/10

(2)  √145/2

(3)  √145/11

(4)  √145/12

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Correct option  (2)  √145/2

Explanation:

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