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# C3 Trig question Watch

1. (Original post by StephenP91)
You've gone wrong. You end up with a quadratic equation. Let me show you.

Multiply by Tanx

Simply re-arrange.

Quadratic equation. You can either make a substitution to make it look like quadratics you've previously dealt with or simply factorise as it is. Makes no difference.
how do you get it to appear as if it was written down rather than seeing ^2?? if u get what i mean??
2. (Original post by meatzaper)
how do you get it to appear as if it was written down rather than seeing ^2?? if u get what i mean??
It's called LaTeX.

It uses a tag [latex]. You can do a lot with it. Makes readings Mathematics a lot easier on forums etc. Look it up if you want. I am sure there is a tutorial or something on the site.

http://www.thestudentroom.co.uk/wiki/LaTex

There you go.
3. (Original post by TobeTheHero)
well done! you could always do it without using substitution
Well I guess this is an easier route :P Thanks anyway
4. (Original post by StephenP91)
It's called LaTeX.

It uses a tag [latex]. You can do a lot with it. Makes readings Mathematics a lot easier on forums etc. Look it up if you want. I am sure there is a tutorial or something on the site.

http://www.thestudentroom.co.uk/wiki/LaTex

There you go.
One quick question

It says to solve it between the ranges 0 < X < 90 and to give my answers to 1 decimal place.

Do i draw 2 CAST diagrams? and If I were to do solve it should I exclude the TanX = -2?

The results are too big
5. (Original post by Jonario)
One quick question

It says to solve it between the ranges 0 < X < 90 and to give my answers to 1 decimal place.

Do i draw 2 CAST diagrams? and If I were to do solve it should I exclude the TanX = -2?

The results are too big
Yeah. You're correct.
6. (Original post by StephenP91)
It's called LaTeX.

It uses a tag [latex]. You can do a lot with it. Makes readings Mathematics a lot easier on forums etc. Look it up if you want. I am sure there is a tutorial or something on the site.

http://www.thestudentroom.co.uk/wiki/LaTex

There you go.
Thank you... just noticed the math joke in your sig lol
7. (Original post by Jonario)
One quick question

It says to solve it between the ranges 0 < X < 90 and to give my answers to 1 decimal place.

Do i draw 2 CAST diagrams? and If I were to do solve it should I exclude the TanX = -2?

The results are too big
You don't need to draw a CAST diagram. Just simply remember it. Then if it's Tan, it's AAA and 180+AAA, if it's Sin, it's AAA and 180-AAA and if it's Cos, it's AAA and 360-AAA. You just have to remember it isn't the same when x is negative.

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Updated: December 5, 2010
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