# Maths Edexcel C4Watch

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#1
I think we should start a thread of tricky questions is C4. For example, finding the integral of 2cos4xcos4x...
0
4 years ago
#2
(Original post by Ajh724)
integral of 2cos4xcos4x...
Do you know how to do this? If not do you want a hint?
0
4 years ago
#3
(Original post by Ajh724)
I think we should start a thread of tricky questions is C4. For example, finding the integral of 2cos4xcos4x...
Did you mean for the two arguments to be different? As this is a fairly standard integral.
0
#4
Ans:x + 1/8sin8x

I thought it was quite tricky...
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#5
Can someone explain why (n+1)!+n!=n!(n+1+1)

I dont understand
0
4 years ago
#6
(Original post by Ajh724)
Can someone explain why (n+1)!+n!=n!(n+1+1)

I dont understand
What does (n+1)! look like expressed in terms of just (n+1) and n?
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#7
Got it thanks.

Ans: (n+1)n!+n! therefore n!(n+1+1) thanks
0
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