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anonymous
 5 years ago
Cos(2x)=1/2 how do u find the exact values
anonymous
 5 years ago
Cos(2x)=1/2 how do u find the exact values

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the definition for cos is: adj/hyp of right triangle. so the adj side is 1; the hyp is 2; We can draw this, or you can just remember the angle that has a cos of 1/2...60 degrees; 2x = 60 x = 60/2 = 30

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0there is a second angle with a cos=1/2... 60; or x = 30
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