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If a vector vecP makes an angle alpha, b...

If a vector `vecP` makes an angle `alpha, beta, gamma " with " x,y,z` axis respectively then it can be represented as `vecP=P[cos alphahati+cos beta hatj+ cos gamma hatk]`. Choose the correct option(s) :-\

A

`cos^(2) alpha + cos^(2) beta +cos^(2)gamma=1`

B

`vecP. vecP=P^(2)`

C

`vecP.(hati-hatk)=P(cos alpha-cos gamma)`

D

`vecP. hati= cos alpha`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
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