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# C2 Trigonometric Equations. Watch

1. Just wanted to know if you have sin3x and then divide by cos 3x do you then get tanx or tan3x?
2. (Original post by Mackiemcmasher)
Just wanted to know if you have sin3x and then divide by cos 3x do you then get tanx or tan3x?
tan3x.

You can think of them in terms of something like 'a' if you want. Then sina/cosa = tana, and just substitute in a=3x or x or whatever you want.
3. (Original post by SeanFM)
tan3x.

You can think of them in terms of something like 'a' if you want. Then sina/cosa = tana, and just substitute in a=3x or x or whatever you want.
Thanks this is actually a good way of doing this.
4. Substituting is also a fantastic way of solving the trigonometric quadratic equations too

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