In the shown fig . 5.12 (a) , (b) and (c ) , find the angle between A and B .
(b)
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In Fig., find equivalent capacity between A and B.

For the combination of resistors shown in (fig.) (a) find the equivalent resistance between (i) C and D and (ii) A and B. .

If |vec a|=8,|vec b|=3 and |vec axvec b|=12, find the angle between vec a and vec b.

If A=B+e and the values of A,B and C are 13,12 and 5 respectively, then the angle between A and C will be

Iron rods a, b, c, d, e and f are making a design in a bridge as shown in Fig. 5.47, in which a ||b, c ||d, e || f. Find the marked angles between (i) b and c (ii) d and e (iii) d and f (iv) c and f

The magnitude of vectros vec A, vec B and vec C are 12, 5 and 13 units respectively and vec A + vec B= vec C , find the angle between vec A and vec B .

If vec a + vec b = vec c and | vec a | = | vec b | = | vec c | find the angle between vec a and vec b