A simple pendulum is vibrating with an angular amplitude of 90^(@). For what values of theta with vertical, the acceleration is directed. 1. vertically upwards 2. horizontally 3. verticaly downwards

A simple pendulum is vibrating with an angular amplitude of 90^(@). Fo

1.	A simple pendulum is vibrating with an angular amplitude of 90^(@). For what values of theta with vertical, the acceleration is directed. 1. vertically upwards 2. horizontally 3. verticaly downwards
Answer» `0^(@),COS^(_1)1//sqrt(3),90^(@)` `cos^(-1)(1//sqrt(3)),0^(@),90^(@)` `90^(@),cos^(-1)1//sqrt(3),0^(@)` `cos^(-1)(1/sqrt(3)),90^(@),0^(@)` ANSWER :A