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mitchelsewbaran
 2 years ago
Which of the following is an exact value of cos 15° ?
mitchelsewbaran
 2 years ago
Which of the following is an exact value of cos 15° ?

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Azteck
 2 years ago
Best ResponseYou've already chosen the best response.2\[\large \cos15=\cos(6045)\] Double angle results. \[\large\cos(6045)=\cos60\cos45+\sin60\sin45\]

Azteck
 2 years ago
Best ResponseYou've already chosen the best response.2Now find out for cos15 after I gave you a headstart
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