Flag Vectors> vects...
question mark

important formulae

NISHANT CHANDANSHIVE , 14 Years ago
Grade 12
anser 1 Answers
SAGAR SINGH - IIT DELHI

Last Activity: 14 Years ago

Dear nishant,

1) If  then magnitude or length or norm or absolute value of is
2) A vector of unit magnitude is unit vector. If  is a vector then unit vector of  is denoted by  and         
3) Important unit vectors are , where , ,
4) The components of unit vectors of   are called the direction cosines of , denoted by  and
5) If , , , then  are called directional angles of the vectors  and
6) If  and  are the two points, then
7) If   and  then


8) If  and  is a scalar number, then.
9) In vector addition
            I.    
            II.   
            III.
            IV.  ,        is the additive identity in vector addition.
            V.    ,        is the inverse in vector addition.

We are all IITians and here to help you in your IIT JEE preparation.

All the best.

 If you like this answer please approve it....

win exciting gifts by answering the questions on Discussion Forum

 

Sagar Singh

B.Tech IIT Delhi

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...