Question

what will be the answer​

Answer 1

option c and a!!!!!!!! are correct answer

Answer 2

For first question

Let a and b be the two unit vectors making 60° angle with each other.

Vector product of a and b is

$\hat{a}\times \hat{b} = |\hat{a}||\hat{b}| \sin(60\degree)\hat{n}$

$\implies |\hat{a} \times \hat{b}| = 1 \times 1 \times \sin(60\degree)$

$= \frac{ \sqrt{3} }{2}$

Therefore correct option is D

For second question

Let a and b be the two unit vectors perpendicular to each other. Then a makes an angle of 90° with b or vice versa.

Scalar product of a and b is

$\hat{a}\cdot \hat{b} = |\hat{a}||\hat{b}| \cos(90\degree)$

$= 1 \times 1 \times 0$

$= 0$

Therefore correct option is A