Show that the thre angles of the triangle with vertices (1,-1,1), (2,3,-1)` and (3,0,2) are, respectively, cos^-1 (2/sqrt(114), cos^-1 4/sqrt(176) and cos^-1 17/sqrt(399))`

Show that the thre angles of the triangle with vertices (1,-1,1), (2,3,-1) and (3,0,2) are, respectively, cos^-1 (2/sqrt(114)), cos^-1( 4/sqrt(126)) and cos^-1 (17/sqrt(399))

Find the value of cos^(-1)sqrt(2/3)-cos^(-1)""(sqrt(6)+1)/(2sqrt(3))

Evaluate the value of tan^(-1) (-sqrt(3)) +cos^(-1) (1/(sqrt(2))) + sin^(-1) (-(sqrt(3))/2)

4 cos^(2)x + sqrt(3) = 2(sqrt(3)+1)

If cos^(-1)sqrt(p)+cos^(-1)sqrt(1-p)+cos^(-1)sqrt(1-q)=(3pi)/(4)"than :"q=

the value of cos^-1sqrt(2/3)-cos^-1 ((sqrt6+1)/(2sqrt3)) is equal to:

The value of tan^(-1)(sqrt3)+cos^(-1)((-1)/sqrt2)+sec^(-1)((-2)/sqrt3) is