<PRE><B>Question 1188001</B>
If A = 2i + 3j + 4k, B = -1i + 6j - k and C = 1i + 6j + xk represent the sides of right angle triangle then find value of x? 
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a^2 = Magnitude of A squared = (2^2 + 3^2 + 4^2) = 29
b^2 = Mag of B squared = 38
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If C is the hypotenuse, its Mag^2 = a^2 + b^2 = 67
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c^2 = 1^2 + 6^2 + x^2 = x^2 + 37 = 67
x^2 = 30
x = sqrt(30)</PRE>