If `A=cos^2theta+sin^4theta,` prove that `3/4lt=Alt=1` for all values of `thetadot`

Explanation

Given,`A=cos^2theta+sin^4theta`

`A=cos^2theta+sin^2thetasin^2thetalecos^2theta+sin^2theta`

`A=cos^2theta+sin^2thetasin^2thetale1 ->(1)`



or `A=cos^2theta+sin^4theta`

`A=(1−sin^2theta)+sin^4theta`

rearranging we can write it as,
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