`x=cos1^@, y=cos1=>`

If x=cos 1 , y= cos1^(@) then

I: If x= sin 1 , y= sin1^(@) then x lt y II : If x = cos 1 , y = cos 1^(@) " then " x lt y

If cos^-1 x +cos^-1y + cos^-1z = pi and x + y + z = 3/2 , then show that x = y = z.

Let A = [[cos ^ (- 1) x, cos ^ (- 1) y, cos ^ (- 1) zcos ^ (- 1) y, cos ^ (- 1) z, cos ^ (- 1) xcos ^ (- 1) y, cos ^ (- 1) z, cos ^ (- 1) xcos ^ (- 1) z, cos ^ (- 1) x, cos ^ (- 1) y]] such x + y + z is

If cos^(-1) x + cos^(-1) y + cos^(-1) z = pi , then find sin^(-1) x + sin^(-1) y + sin^(-1) z

If cos^(-1) x + cos^(-1) y + cos^(-1) z = pi , prove that x^(2) + y^(2) + z^(2) + 2xyz = 1

If cos^(-1) x + cos^(-1) y + cos^(-1) z = pi" , prove that " x^(2) + y^(2)+ z^(2) + 2xyz = 1 .

If cos^-1 x +cos^-1 y + cos ^-1 z=pi , prove that x^2+y^2+z^2+2xyz=1 .

If cos^(-1) x + cos^(-1) y + cos^(-1) z = pi , prove that x^(2) + y^(2) + z^(2) + 2xyz = 1

If cos^(-1) x + cos^(-1) y + cos ^(-1) z = pi and 0 lt x,y,z lt 1 show that x^(2) +y^(2) +z^(2) +2xyz = 1