Question

Two vector both equal in magnitude,have their resultant equal in magnitude of either vector.The angle between the vector is

Answer 1

let R , Q are two vector which magnitude is equal also resultant of it also equal to either
e.g | R | = | Q |

and resultant = R + Q
magnitude of resulatant = | R | = | Q|

so, | R | = | R + Q |

| R | = √( | R|² + | Q|² +2|R | |Q| cos∅)

take square of both sides

R² = R² + Q² + 2|R| |Q| cos∅

put | R| =|Q|

R² = R² + R² +2R² cos∅

cos∅ = -1/2

∅ = 2π/3

Answer 2

Step-by-step explanation:

hope it helps !! :) hihi