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# Maths c2 help watch

1. 3cos^2x+cosx+2 = 3sin^2x
2. (Original post by ramshahk)
3cos^2x+cosx+2 = 3sin^2x
Some certain identity might help. Good luck.
3. (Original post by RDKGames)
Some certain identity might help. Good luck.
Oops sorry forgot to include it
-pi <x <pi
4. (Original post by ramshahk)
Oops sorry forgot to include it
-pi <x <pi
Er... That's not what I meant.

is the domain for the solutions that you need to focus on. It's not a trigonometric identity...
5. (Original post by RDKGames)
Er... That's not what I meant.

is the domain for the solutions that you need to focus on. It's not a trigonometric identity...
Its a trig question
6. (Original post by ramshahk)
3cos^2x+cosx+2 = 3sin^2x
3cos^2x + cosx + 2 = 3sin^2x

3cos^2x + cosx + 2 = 3(1 - cos^2x)

3cos^2x + cosx + 2 = 3 - 3cos^2x

You can do the rest from here

Posted from TSR Mobile
7. Try using sin^2 x+cos^2 x=1 to get rid of sin and see ow far you get from there
8. (Original post by ramshahk)
Its a trig question
It is indeed. Have you been taught how to solve these?? Because so far from your multiple threads on basic trig equations it doesn't seem that you know how to do these, not to mention 0 attempts from you, in which case I suggest you first learn the content.

Don't just post questions and expect others to do them for you. Just post a question and tell us what you aren't able to do specifically, or post an attempt.
9. (Original post by RDKGames)
It is indeed. Have you been taught how to solve these?? Because so far from your multiple threads on basic trig equations it doesn't seem that you know how to do these, not to mention 0 attempts from you, in which case I suggest you first learn the content.

Don't just post questions and expect others to do them for you. Just post a question and tell us what you aren't able to do specifically, or post an attempt.
Yes i have been taught this. Im just stuck on a few questions.. my teacher gave us 80 questions to do which were very hard a level questions
10. (Original post by DamnDaniel2)
3cos^2x + cosx + 2 = 3sin^2x

3cos^2x + cosx + 2 = 3(1 - cos^2x)

3cos^2x + cosx + 2 = 3 - 3cos^2x

You can do the rest from here

Posted from TSR Mobile
Thaank yoou

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