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jkristia
jkristia is offline
#4
Feb19-12, 06:59 PM
P: 54

How to find the exact value of cos 67.5 ?


>>How is Cos(x) related to Cos(x+90), how
yeah, that definitely makes it simpler



>>Try multiplying both the top and bottom by
I have tried, but I seem to end up with a square root I can't get rid of, but I will keep trying.


Thanks for your help
Jesper
Attached Thumbnails
attempt3.png