- #1
yungman
- 5,755
- 292
[tex]\Psi=\tan^{-1}\left(\frac{\cos\omega t}{\cos(\omega t+\delta)}\right)[/tex]
I want to find out whether ##\Psi## increase or decrease with time t, if ##\delta## is positive and if ##\delta## is negative.
[tex]\Psi=\tan^{-1}\left(\frac{\cos\omega t}{\cos(\cos\omega t \cos \delta+\sin\omega t \sin\delta)}\right)\;=\;\tan^{-1}\left(\frac {1}{(\cos\delta + \tan(\omega t)\sin \delta)}\right)[/tex]
[tex]\Rightarrow\;\Psi=\tan^{-1}\left(\frac{1}{K_1+K_2\tan \omega t}\right)[/tex]
where ##K_1## is a constant and ##K_2## is a constant following the sign of ##\delta##.
This is as far as I know how to go, what can I do to simplify it. I want to find out whether ##\Psi## increase or decrease with time if ##\delta## is positive and if ##\delta## is negative.
I want to find out whether ##\Psi## increase or decrease with time t, if ##\delta## is positive and if ##\delta## is negative.
[tex]\Psi=\tan^{-1}\left(\frac{\cos\omega t}{\cos(\cos\omega t \cos \delta+\sin\omega t \sin\delta)}\right)\;=\;\tan^{-1}\left(\frac {1}{(\cos\delta + \tan(\omega t)\sin \delta)}\right)[/tex]
[tex]\Rightarrow\;\Psi=\tan^{-1}\left(\frac{1}{K_1+K_2\tan \omega t}\right)[/tex]
where ##K_1## is a constant and ##K_2## is a constant following the sign of ##\delta##.
This is as far as I know how to go, what can I do to simplify it. I want to find out whether ##\Psi## increase or decrease with time if ##\delta## is positive and if ##\delta## is negative.