Mark the correct alternative in each of the following:

If θ is the angle between any two vectors and , then when θ is equal to

Mark the correct alternative in each of the following:

If θ is the angle between the vectors and , then sin θ =

Mark the correct alternative in each of the following:

If , then

Mark the correct alternative in each of the following:

The value of is

Mark the correct alternative in each of the following:

The value of , is