If cos^-1 ⁡x+ cos^-1 ⁡y+ cos^-1 ⁡z=3 , then

Question

Accepted Answer

Correct answer: B. (b) Given the equation, cos^-1 ⁡x+ cos^-1 ⁡y+ cos^-1 ⁡z=3 Principal value of cos^-1 ⁡x ∈ [0 , ] Therefore, cos^-1 ⁡x= cos^-1 ⁡y= cos^-1 ⁡z= x= cos ⁡ =-1=y=z Required equation is x+y+z+3=0

$If cos^{- 1} x + cos^{- 1} y + cos^{- 1} z = 3 π, then$

Solution

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