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If vec a, vec b, vec c are unit vectors ...

If `vec a`, `vec b`, `vec c` are unit vectors and `vec a + vec b + vec c = 0` then the evaluate `vec a. vec b + vec b.vec c + vec c.vec a`.

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MODERN PUBLICATION-VECTOR-EXERCISE
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  7. Let vec a is any vector than what is the value of (vec a.hat i)hat i+(...

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  8. What is the value of (hat i+hat j)×(hat j+hat k).(hat k+hat i)?

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  14. Prove that (vec a × vec b).(vec c × vec d) = [[vec a.vec c,vec a.vec d...

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