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Mathematics 7 Online
OpenStudy (anonymous):

cos(65degrees) = sqrt ( (1 + cos(130 degrees) /2) ) true or false

OpenStudy (nubeer):

try using calculator to get answer.. and see if left side answer is equal to right side or not.

OpenStudy (anonymous):

half angle

OpenStudy (anonymous):

OpenStudy (anonymous):

so it is true

OpenStudy (anonymous):

well It was a pleasure to help you saludos desde Perú

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