1/cosx -cosx = sinxtanx

grade 11 math course, trig identities problem set
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1/cos(x)-cos(x)=(1-cos2(x))/cos(x)=sin2(x)/cos(x)=sin(x)(sin(x)/cos(x))=sin(x)tan(x). QED

ago by Top Rated User (1.2m points)

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