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Find the incorrect statement...

Find the incorrect statement

A

The sum of the square of the direction cosines of `vecr` is 1.

B

The direction ratios of `3veci+4veck` are `((3)/(5),0,(4)/(5))`

C

If `veca.vecb=0` then `veca` and `vecb` are perpendicular vectors.

D

`(veca+vecb).(veca-vecb) =|veca|^(2)-|vecb|^(2).

Text Solution

Verified by Experts

The correct Answer is:
C
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