Question

If $\vec{a},\vec{b},\vec{c}$ are non-coplanar unit vectors such that $\vec{a}\times(\vec{b}\times \vec{c})=\frac{(\vec{b}+\vec{c})}{\sqrt2}$ then the angle between a and b is

• A. 3π/4
• B. π/4
• C. π/2
• D. π

Answer 1

Answer: (A)

3π/4

Answer 2

The correct answer is(A): 3π/4