What will be the value of x + y + z if cos-1 x + cos-1 y + cos-1 z = 3π?

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answerhappygod
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What will be the value of x + y + z if cos-1 x + cos-1 y + cos-1 z = 3π?

Post by answerhappygod »

a) -1/3
b) 1
c) 3
d) -3
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