If angle between `bar(a)` and `bar( b)` is `(pi)/(3)` then angle. Between `2bar( a)` and `-3bar(b)` is.
(A) `(pi)/(3)` (B) `(2 pi)/(3)`(C) `(pi)/(6)`(D) `(5 pi)/(3)`

If |bar(a).bar(b)| = |bar(a) xx bar(b)| & bar(a). bar(b) lt 0 , then find the angle between bar(a) and bar(b) .

If |bar(a)|=4,|bar(b)|=2 and the angle between bar(a) and bar(b) is pi/6 ,then (bar(a)timesbar(b))^(2) is equal to

The angle between the planes 2x-y+z=6 and x+y+2z=7 is (A) pi/4 (B) pi/6 (C) pi/3 (D) pi/2

The p oints O, A, B, C, D are such that bar(OA)= bar a,bar(OB) = bar b,bar(OC) = 2bar a + 3bar b and bar(OD) = bar a- 2 bar b if |bar a|=|3 bar b| then the angle between bar(BD) and bar(AC) is (A) pi (B) pi/2 (C) pi/3 (D) pi/6

If |bar(a)|=4,|bar(b)|=2 and the angle between bar(a) and bar(b) is pi/6 ,then (|bar(a)timesbar(b)|)^(2) is equal to

If |veca.vecb|=sqrt(3)|vecaxxvecb| then the angle between veca and vecb is (A) pi/6 (B) pi/4 (C) pi/3 (D) pi/2

The angle between the plane 2x-y+z=6 nand x+y+2z=3 is (A) pi/3 (B) cos^-1 1/6 (C) pi/4 (D) pi/6

If veca+vecb+vecc=0, |veca|=3, |vecb|=5, |vecc|=7, then angle between veca and vecb is (A) pi/6 (B) (2pi)/3 (C) (5pi)/3 (D) pi/3

If |vec a|=2,|vec b|=sqrt(3) and (bar(a),bar(b))=30^(@) then the angle between the vectors bar(b) and bar(a)-bar(b) is

Angle between the tangents to the curve y=x^(2)-5x+6 at the points (2,0) and (3,0) is : (a) (pi)/(3) (b) (pi)/(2)( c) (pi)/(6) (d) (pi)/(4)