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#1 Help Me ! » Trigonmetry question cos 15 » 2009-03-15 10:50:19

gretty
Replies: 6

Hello

How do you do

Find the exact value of the following
cos (15 "Pie" / 2 )

Sorry dont know how to write pie on a keyboard.

What is the question asking me to do, just put this expression into a calculator, is there a method to doing this kind of question?

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