A simple pendulum has a bob of mass m an...

A simple pendulum has a bob of mass `m` and swings with an angular amplitude `phi`. The tension in thread is `T`. At a certain time the string makes an angle `theta` with the vertical `(theta le phi)`

T= mg cos `theta`, all values of `theta`

T= mg cos `theta`, only for `theta=phi`.

T =mg , for `theta= cos ^(-1) [1/3(2cos phi+1)]`

T will larger for smaller values of `theta`.

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