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213.Prove the following:(1) a-bl=\ a + bla. b = 0)(ii) a. {(a . a)b- (a. b) a ) = 04.(i)Let u, V and w be vectors in 2-space(2-parts). Prove that u.(v + w)=u.x+u.w(ii) Find the direction cosines of the vector î - j + k5. (1)Find the initial point of the vector v = (1,3) whose terminal point is B(-1.2).(11) Given that the vector OA = (1,-3) and OB = (3,-1) , find the position vector ofpoint dividing the line AB in the ratio 2:3(iii)Find the orthogonal (vector)projections of the vectors a = (1,0) and b = (0,1) onthe line L that makes an angle 0 with the positive x - axis in xy plane i.e R2(iv) Find the coordinates of P if ||OP|| = 5 and OP is in the direction of vector (2,-1,4). |
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Answer» I don't KNOW but you have to only ask one question at a one TIME OK |
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