Question

if A . B = 1, A=2, B=1 then the angle between them is?
please explain with full details...​

Answer 1

Answer:

Theta = 60°

Explanation:

A•B = ABcos theta

A . B = 1, A=2, B=1

1 = 2cos theta

cos theta = 1/2

theta = 60°

Answer 2

Explanation:

given ,

b=1 and b=1

a=2

let the angles be 1x,1x,2x

hence 1x+1x+2x =180°

4x=180°

x=45°

b=1x = 1*45 =45°

b=1x = 1*45= 45°

a=2x = 2*45=90°

hope this will help you out