1.

If direction cosines of a line are 1/b, 1/b, 1/b then find the value of b.​

Answer»

n that direction of COSINES of LINE is 1/c, 1/c, 1/c

We know the SUM of the squares of the direction cosines is one.

i.e. (1/c)^2 + (1/c)^2 + (1/c)^2

3/c^2=1

c^2 = 3

c=±\sqrt{3}



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