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Prove that 2cos? = 2^1/2 + 2^1/2 + 2cos 4? 2^1/2 means root 2.
wait i will have to try it......hmmm..... ok.. apply inverse trignometry rules...that will surely get you towards the solution!
wait i will have to try it......hmmm.....
ok..
apply inverse trignometry rules...that will surely get you towards the solution!
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