A-level past-paper question
https://cdn.discordapp.com/attachments/563652534569533452/568794354555158529/568794321516625935.png
Can someone help me with 14) d). I don't know what you are supposed to do as it looks like you need a negative angle?
Can someone help me with 14) d). I don't know what you are supposed to do as it looks like you need a negative angle?
Original post by Al4stair
https://cdn.discordapp.com/attachments/563652534569533452/568794354555158529/568794321516625935.png
Can someone help me with 14) d). I don't know what you are supposed to do as it looks like you need a negative angle?
Can someone help me with 14) d). I don't know what you are supposed to do as it looks like you need a negative angle?
The overall question you've posted was one I found exceptionally challenging and confusing to do. But here, part d is infact the easiest part. You can use the sin(a+b) identity to derive sin(a-b). You'll need some understanding of the sine and cosine functions and how to express them in different forms (linking back to even and odd functions).
Can you post your working so far ?
Btw, if anyone here is planning to do AQA Paper 1 June 2018 as a practice mock in a couple of weeks time, do not click this link. This question is in that paper.
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