cynthianixon1231
cynthianixon1231 cynthianixon1231
  • 19-03-2017
  • Mathematics
contestada

why is sin 10= cos 80

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jdoe0001 jdoe0001
  • 19-03-2017
hint:   [tex]\bf \textit{Cofunction Identities} \\ \quad \\ sin\left(90^o-{{ \theta}}\right)=cos({{ \theta}})\qquad \boxed{cos\left(90^o-{{ \theta}}\right)=sin({{ \theta}})} \\ \quad \\ \quad \\ tan\left(90^o-{{ \theta}}\right)=cot({{ \theta}})\qquad cot\left(90^o-{{ \theta}}\right)=tan({{ \theta}}) \\ \quad \\ \quad \\ sec\left(90^o-{{ \theta}}\right)=csc({{ \theta}})\qquad csc\left(90^o-{{ \theta}}\right)=sec({{ \theta}})[/tex]
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