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Grade: 12
        
Cos​​−1x+cos−1y+cos−1z =π and x+y+z =3/2 then prove that x=y=z
24 days ago

Answers : (1)

Arun
15903 Points
							
 
Dear student
 
we proceed with reverse side
x = y = z
 
then 3 cos^-1 x = pi
 
cos^-1 x = pi/3
x = ½
 
hence y = z= ½
 
hence 
 
x + y + z = 3/2
24 days ago
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