CUET and UG exam AP EAPCET Engineering Mock Test Series 2025 Mathematics Vector Algebra Scalar and Vector Product
Let \(\hat{a}\) and \(\hat{b}\) be two unit vectors. If the vectors \(\vec{c}=\hat{a}+2\hat{b}\) and \(\vec{d}=5\hat{a}-4\hat{b}\) are perpendicular to each other, then the angle between \(\hat{a}\) and \(\hat{b}\) is
1
\(\dfrac{\pi}{6}\)
2
\(\dfrac{\pi}{2}\)
3
\(\dfrac{\pi}{3}\)
4
\(\dfrac{\pi}{4}\)