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Q.1) The direction ratios of a line are 1 , -2 , -2 . What are their Direction cosines ..?
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Answered by
0
1/3,-2/3,-2/3 is their direction cosines.
RowdyRobot:
How ?
if the direction ratio of any vector is a,b,c .then it's direction cosines are a/p,b/p,c/p.where p=√{a^2 + b^2 + c^2}
Answered by
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1/3,-2/3,-2/3 are direction cosines .
Use formula
a/square root of a^2+b^2+c^2 ,b/square root of a^2+b^2+c^2,c/square root of a^2+b^2+c^2
Use formula
a/square root of a^2+b^2+c^2 ,b/square root of a^2+b^2+c^2,c/square root of a^2+b^2+c^2
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