The vectors `3a – 5b` and `2a+b` are mutually perpendicular and the vectors `a+4b\ & -a+b` are also mutually perpendicular. Then the acute angle between `a and b` is

The vectors 3a5b and 2a+b are mutually perpendicular and the vectors a+4b&-a+b are also mutually perpendicular.Then the acute angle between a and b is

Vectors 3 vec a-5 vec b and 2 vec a+ vec b are mutually perpendicular. If vec a+4 vec b and vec b- vec a are also mutually perpendicular, then the cosine of the angle between a and b is a. (19)/(5sqrt(43)) b. (19)/(3sqrt(43)) c. (19)/(2sqrt(45)) d. (19)/(6sqrt(43))

Vectors 3 vec a-5 vec b and 2 vec a+ vec b are mutually perpendicular. If vec a+4 vec b and vec b- vec a are also mutually perpendicular, then the cosine of the angle between a and b is a. (19)/(5sqrt(43)) b. (19)/(3sqrt(43)) c. (19)/(2sqrt(45)) d. (19)/(6sqrt(43))

Vectors 3veca-5vecb and 2veca + vecb are mutually perpendicular. If veca + 4 vecb and vecb - veca are also mutually perpendicular, then the cosine of the angle between veca nad vecb is

Vectors 3veca-5vecb and 2veca + vecb are mutually perpendicular. If veca + 4 vecb and vecb - veca are also mutually perpendicular, then the cosine of the angle between veca nad vecb is

Vectors 3vec a-5vec b and2vec a+vec b are mutually perpendicular.If vec a+4vec band vec b-vec a are also mutually perpendicular,then the cosine of the angel between aandb is a.(19)/(5sqrt(43)) b.(19)/(3sqrt(43)) c.(19)/(2sqrt(45)) d.(19)/(6sqrt(43))

If a,b,c are mutually perpendicular unit vectors then |a+b+c|=

Let bar(a),bar(b) be two non zero vectors such that vectors 3bar(a)-5bar(b) and 2bar(a)+bar(b) are mutually perpendicular. If bar(a)+4bar(b) and bar(b)-bar(a) are also mutually perpendicular then the cosine angle between bar(a) and bar(b) is

If a, b and care mutually perpendicular unit vectors, then |a+b+c| is equal to...