Scalar product question - find the product a.b?

3 ⤊

Two vectors a and b are of lengths 3units and 2units respectively. The angle between them is Pi/3. Find the product a.b

Please help!

2007-11-14 00:27:10 · 2 answers · asked by Hayley* 3 in Science & Mathematics ➔ Mathematics

a · b = (3) (2) cos 60°
a · b = 6 x 1/2
a · b = 3

2007-11-14 03:51:57 · answer #1 · answered by Como 7 · 3⤊ 1⤋

a.b=ab cos(pi/3)
=> a.b=3*2*(1/2)
=> a.b=3

2007-11-14 08:47:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋