" यदि "|vec a+vec b|=|vec a-vec b|" तो सिद्ध करे कि "vec a" तथा "vec b" परस्पर लंब हैं "_(" Гु० प्र "0)

if | vec a | = | vec b | = | vec a + vec b | = 1 then | vec a-vec b |

if | vec a | = | vec b | then find [(vec a + vec b) * (vec a-vec b)]

If vec a , vec b are two vectors, then write the truth value of the following statements: vec a=- vec b| vec a|=| vec b| | vec a|=| vec b| vec a=+- vec b | vec a|=| vec b| vec a= vec b

If vec a , vec b are two vectors, then write the truth value of the following statements: vec a=- vec b| vec a|=| vec b| | vec a|=| vec b| vec a=+- vec b | vec a|=| vec b| vec a= vec b

If? B, c are three vectors such that | vec a | = 5, | vec b | = 12 and | vec c | = 13 and vec a + vec b + vec c = 0 then vec a * vec b + vec b * vec c + vec c * vec a

vec a, vec b ,, vec c are coplanar vectors, prove that vec a, vec b, vec cvec with a, vec with b, vec a, vec with bvec a, vec bvec b, vec b, vec a] | = 0

If vec a, vec b, vec c are three vectors such that vec a . (vec b + vec c) + vec b . (vec c + vec a) + vec c . (vec a + vec b) = 0 and |vec a| = 1, |vec b | = 4, |vec c| = 8 , then |vec a + vec b + vec c| =

vec r xxvec a = vec b xxvec a, vec r xxvec b = vec a xxvec b, vec a! = 0, vec b! = 0, vec b! = lambdavec a, vec a is not perpendicular to vec b then vec r is

( vec a+ vec b)dot( vec b+ vec c)xx( vec a+ vec b+ vec c)= [ vec a\ vec b\ vec c] b. "\ "0"\ " c. 2[ vec a\ vec b\ vec c] d. -[ vec a\ vec b\ vec c]

If vec a ,\ vec b ,\ vec c are three vectors such that vec adot vec b= vec adot vec c then show that vec a=0\ or ,\ vec b=c\ or\ vec a_|_( vec b- vec c)dot