Question

if the angle between the two equal vectors is 60° the angle made by resultant vector with vertical is a) 30 b) 60 c) 40 d) 90

Answer 1

Explanation:

tanα=BsinθA+Bcosθ

where θ is the angle between vectors A and B, and α is the angle between the resultant and the first vector, i.e., vector A.

Here substitute θ = 60 degrees and A=B.

Now you get α = 30 degees.

hence answer is 30