Question: If sin-'x + sin-ly +sin'z =t prove that x +y + z + 4xy%z? = 2 (xy? + yz? +z?x?)

If sin-'x + sin-ly +sin'z =t prove that x +y + z

If sin-'x + sin-ly +sin'z =t prove that x +y + z + 4xy%z? = 2 (xy? + yz? +z?x?)

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