#20 Direction cosine of the line y-x=0=z | How to find direction cosines and direction ratios

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In This video we are discussed basic concept of Equation of a straight line in symmetrical form. This video lecture helpful to engineering students and under graduate student .this is also helpful to CSIR NET/GATE/IIT JAM/NBHM /TIFR students.
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[@danishmir5501]

sir why are you not giving any reply

[@danishmir5501]

hlo sir