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In a righht angled triangle the three ve...

In a righht angled triangle the three vectors `veca,vecb` and `vecc` add to zero. Then `veca,vecb` is

A

`-9`

B

`+9`

C

0

D

`-3`

Text Solution

Verified by Experts

The correct Answer is:
C
`veca.vecb=ab cos 90^(@)`
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