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SashaShulga
@SashaShulga
October 2021
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cos(a-150)-cos(a+150)
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mctapok
Verified answer
Cos(a-150)-cos(a+150)=cosa*cos150+sina*sin150-cosa*cos150+sinasin150=2sinasin150=2*sina*1/2=sina
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Answers & Comments
Verified answer
Cos(a-150)-cos(a+150)=cosa*cos150+sina*sin150-cosa*cos150+sinasin150=2sinasin150=2*sina*1/2=sina