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# C3 - trig watch

1. Hello, I'm stuck/confused with the following.

Tan^2X+2tanx+1 express in terms of cotx. I think it's (cot^2x)+(1/2cotx)+1. But there's a devil in me trying to make believe its (cot^2x)+(2cotx)+1 - surely this can't be right? Which one is it
2. (Original post by Cool-Light)
Hello, I'm stuck/confused with the following.

Tan^2X+2tanx+1 express in terms of cotx. I think it's (cot^2x)+(1/2cotx)+1. But there's a devil in me trying to make believe its (cot^2x)+(2cotx)+1 - surely this can't be right? Which one is it
would you be as kind as to post your working?
3. (Original post by Cool-Light)
Hello, I'm stuck/confused with the following.

Tan^2X+2tanx+1 express in terms of cotx. I think it's (cot^2x)+(1/2cotx)+1. But there's a devil in me trying to make believe its (cot^2x)+(2cotx)+1 - surely this can't be right? Which one is it
2tanx is simply (2)x(tanx). You can then change (tanx) to (1/cotx) so you end up with (2)x(1/cotx) which is (2/cotx). I think

(the 'x's outside the brackets being multiplication signs rather than the variable x)
4. (Original post by Cool-Light)
Hello, I'm stuck/confused with the following.

Tan^2X+2tanx+1 express in terms of cotx. I think it's (cot^2x)+(1/2cotx)+1. But there's a devil in me trying to make believe its (cot^2x)+(2cotx)+1 - surely this can't be right? Which one is it

5. (Original post by TeeEm)
would you be as kind as to post your working?
Ahhh, here's the original question manipulated by me. "Simplify the following expressions to a single term"

Question: (tan^4x)+(2tan^x)+1, please don't solve it, it's one of my homework questions, I just need a hint. So I tried that up there in order to experiment and see where I get...
6. (Original post by morgan8002)

Oh, so the devil turned out to be angel . Thank you for clearing the misconception
7. (Original post by Cool-Light)
Ahhh, here's the original question manipulated by me. "Simplify the following expressions to a single term"

Question: (tan^4x)+(2tan^x)+1, please don't solve it, it's one of my homework questions, I just need a hint. So I tried that up there in order to experiment and see where I get...
look at post 4
is what morgan8002 has written your question because what you have typed is ambiguous
8. Wait what...?
9. (Original post by TeeEm)
look at post 4
is what morgan8002 has written your question because what you have typed is ambiguous
So there's more than one way of writing it?
10. (Original post by Cool-Light)
Ahhh, here's the original question manipulated by me. "Simplify the following expressions to a single term"

Question: (tan^4x)+(2tan^x)+1, please don't solve it, it's one of my homework questions, I just need a hint. So I tried that up there in order to experiment and see where I get...
does tan^4x mean ? what about 2tan^x?
11. (Original post by Cool-Light)
So there's more than one way of writing it?

NO!

http://www.thestudentroom.co.uk/show....php?t=2873737
12. Haha, that image made my day. I'll write it for u n upload
13. (Original post by Cool-Light)
Haha, that image made my day. I'll write it for u n upload
thanks
14. Hopefully it posted...
Attached Images

15. (Original post by Cool-Light)
Hopefully it posted...
You can't legally derive the second expression.
Think about how you can get it in a form where you can use the standard trig identities.
16. (Original post by morgan8002)
You can't legally derive the second expression.
Think about how you can get it in a form where you can use the standard trig identities.
Omfg!! Thank you!!!!! I'm an idiot, if we were to factorise the image I uploaded without the illegal move we would get this:
17. (Original post by Cool-Light)
Omfg!! Thank you!!!!! I'm an idiot, if we were to factorise the image I uploaded without the illegal move we would get this:
I don't see an image, but factorising is the way to go. Do you see where to go now?
18. (Original post by morgan8002)
You can't legally derive the second expression.
Think about how you can get it in a form where you can use the standard trig identities.
And true, I just did it to view my understanding from an easier perspective if that makes sense?
Attached Images

20. Sorry my net and my phone decides to freeze at certain points, [email protected]!

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