" 21."quad " cos "^(-1)(1/x)

Solve the equation: cos^(-1)(a/x)-cos^(-1)(b/x)=cos^(-1)(1/b)-cos^(-1)(1/a)

Solve the equation: cos^(-1)(a/x)-cos^(-1)(b/x)=cos^(-1)(1/b) - cos^(-1)(1/a)

Set of all values of x satisfying in inequation cos^(-1)sqrt(x)>sin^(-1)sqrt(x), is a. (0,1/2) b. [0,1/2) c. (1/2,1) d. (1/2,1)

Set of all values of x satisfying in inequation cos^(-1)sqrt(x)>sin^(-1)sqrt(x), is a. (0,1/2) b. [0,1/2) c. (1/2,1) d. (1/2,1)

Solve the equation: cos^(-1)((a)/(x))-cos^(-1)((b)/(x))=cos^(-1)((1)/(b))-cos^(-1)((1)/(a))

If sin^(-1)(cos^(-1)x)lt1 and cos^(-1)(cos^(-1)x)lt1 then x in

If Sin^(-1)(cos^(-1)x) lt 1 and cos^(-1)(cos^(-1)x) lt 1" then "x in

Prove that cos^(-1)(3x-4x^3)=3cos^(-1)x,x in[1/2,1]

prove that 3 cos^(-1) x = cos^(-1) (4x^3 - 3x), x in [1/2,1]

Given that (vec x-hat a).(vec x+hat a)=8 and vec x.hat a=2 ,then the angle between (vec x-hat a) and (vec x+hat a) is (A) cos^(-1)((3)/(sqrt(14))) (B) cos^(-1)((3)/(sqrt(21))) (C) cos^(-1)((5)/(sqrt(21))) (D) cos^(-1)((4)/(sqrt(21)))