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# Proving Identities watch

1. I finished C3 a while ago and found it mostly ok, I have been re-visiting a lot of it recently and working on harder examples and getting a good understanding of everything. The next topic I'm coming too though is Proving trignometric equations and I find this so hard compared to the rest of C3. Questions where you are asked to show that two trignometric equations are equal just stump me, my teacher told me to thing of them as a puzzle and try to re-arrange and think carefully about how to get from one to the other but I just end up not being able to. I appreciate that me working on these types of equations in the coming weeks will help but does anyone have any methodologies or tips that make it easier to identify what direction I need to take.
2. (Original post by Mopatop)
I finished C3 a while ago and found it mostly ok, I have been re-visiting a lot of it recently and working on harder examples and getting a good understanding of everything. The next topic I'm coming too though is Proving trignometric equations and I find this so hard compared to the rest of C3. Questions where you are asked to show that two trignometric equations are equal just stump me, my teacher told me to thing of them as a puzzle and try to re-arrange and think carefully about how to get from one to the other but I just end up not being able to. I appreciate that me working on these types of equations in the coming weeks will help but does anyone have any methodologies or tips that make it easier to identify what direction I need to take.
If in doubt

Change everything to sinx and cosx

Remember sin^2x + cos^x = 1

Remove fractions in fractions

Look out for DOTS

If still stuck look at the answer ... Possibly work backwards a few lines

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