A simple pendulum with a bob of mass m swings with an angular amplitude of 60° , when its angular displacement is 30° , the tension of string would be

Q: A simple pendulum with a bob of mass m swings with an angular amplitude of 60° , when its angular displacement is 30° , the tension of string would be
(a) 3√3 mg

(b) (1/2) mg(3√3-2)

(c) (1/2) mg(3√3+2)

(b) (1/2) mg(3-√2)

Ans: (b)