Posted by Melinda on Sunday, January 29, 2012 at 10:03pm.
cos 465°
= cos(105+360)°
= cos 105°
= cos(60+45)°
= cos60cos45 - sin60sin45
=(1/2)(√2/2) - (√3/2)(√2/2)
= (√2 - √6)/4
I think c) comes closest if you had typed it correctly as
(√2 - √3√2)/4 which then is the same as mine
Ok, thank you!
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