If \cos^{−1}x + \cos^{−1}y + \cos^{−1}z = \pi , then find the value of xy + yz + zx :

Agniveer Vayu or IAF Group X 12 July 2021 Shift 3 Paper

Question : 37 of 70

Marks: +1, -0

If $cos^{−1}x + cos^{−1}y + cos^{−1}z = π $ , then find the value of xy + yz + zx :

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