Lacadmanricoviz
Lacadmanricoviz
Math
Answered
Express Cos3x In Terms of Sinx
Sagot :
Jers15viz
Jers15viz
cos(3x)=cos(2x+x)
cos(3x)=cos2xcosx-sin2xsinx
cos(3x)=1-sin²xcosx-2sinxcosxsinx
cos(3x)=1-2sin²x-2sinxsinx
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