Question

a and b are unit vectors
making equal angles with
x-axis at a point O. a is
approaching while b is
moving away from point O.
ifa-b=2(a.b)c, find c​

Answer 1

Answer:

As the given line is equally inclined with all three coordinate axis,<br> let it create angle

with all three coordinate axis.<br> Then,<br> Direction cosines will be

.<br>

<br>

<br>

<br> Since

is inclined at acute angle, therefore,

.<br> Direction cosines will be

.<br> Now,

<br> Therefore,

<br>

<br>

<br>

Explanation:

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