Prove that 2cos? = 2^1/2 + 2^1/2 + 2cos 4?
2^1/2 means root 2.
aritra nandy , 14 Years ago
Grade 10
Trigonometry> very very urgentneed it very very fast...
1 Answers
Vivek Nigam
Last Activity: 14 Years ago
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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