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# URGENT C4 Solomon Paper D Q7(b) help! watch

1. Can someone please explain the mark scheme to this question as I swear cot(of any angle) cannot equal 0?
2. where is the post? Mr_Chipz
3. (Original post by SeanFM)
where is the post? Mr_Chipz
Sorry, I mentioned the question in the title of this post. It's question 7b from this paper below:
https://5c59854d0ccd29d489c9e5e689a8...%20Edexcel.pdf

However I'm struggling to understand the mark scheme for that question (see below link):
https://5c59854d0ccd29d489c9e5e689a8...%20Edexcel.pdf

Help would be much appreciated
4. You have to split it into cos and sin
-2/3 cot2t=0
=>cot2t=0
=>cos2t/sin2t=0
=>cos2t=0
5. (Original post by Mr_Chipz)
Can someone please explain the mark scheme to this question as I swear cot(of any angle) cannot equal 0?
Yes it can.

6. (Original post by Icyytea)
You have to split it into cos and sin
-2/3 cot2t=0
=>cot2t=0
=>cos2t/sin2t=0
=>cos2t=0
Oh I was thinking that, but I wasn't sure that was the right method, I used cot2t = 1/tan2t, but then obviously tan2t can't equal zero since you can't divide by 0...so that confused me . But yeh I understand now, thank you!!
7. (Original post by Student403)
Yes it can.

Aaah, good old Desmos...Yeh sorry for being an idiot, thanks!

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