![[ \ divide \ by \ tan \theta \ on \ both \ sides \ ]](/tpl/images/1379/6533/7667d.png)
![[ \tan ^ 2\theta + 1 = sec ^2 \theta \ , \ tan \theta = \frac{sin \theta }{cos \theta } \ ]](/tpl/images/1379/6533/87fdd.png)
![[\ \frac{sin \theta }{cos \theta } = sin \theta \times sec \theta \ ]](/tpl/images/1379/6533/e666a.png)
![[ \ \frac{1}{sin \theta } = cosec \theta \ , \ \frac{ sec \theta }{sin \theta } = sec \theta cosec \theta \ ]](/tpl/images/1379/6533/48350.png)
![[ \ sin 2 \theta = 2 sin \theta cos \theta \ ]](/tpl/images/1379/6533/dc337.png)
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