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A simple pendulum is vibrating with an a...

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

`0^(@),cos^(_1)1//sqrt(3),90^(@)`

B

`cos^(-1)(1//sqrt(3)),0^(@),90^(@)`

C

`90^(@),cos^(-1)1//sqrt(3),0^(@)`

D

`cos^(-1)(1/sqrt(3)),90^(@),0^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
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