Todas as dúvidas que tiver sobre Trigonometria (ângulos, senos, cosenos, tangentes, etc.), Geometria Plana, Geometria Espacial ou Geometria Analítica
09 mar 2017, 01:01
O valor da expressão k=cossecx-secx/1-tgx, para senx=1/4;é igual a;
15 mar 2017, 14:51
\(1)cossec(x)=\frac{1}{sen(x))}=4\\ 2)sen^2(x)+cos^2(x)=1=>cos^2(x)1-sen^2(x)=>cos(x)=\frac{\sqrt15}{4}\\ 3)sec(x)=\frac{1}{cos(x)}=\frac{4}{\sqrt15}\\ 4)tan(x)=\frac{sen(x)}{cos(x)}=\frac{1}{\sqrt15}\\ 5)1-tan(x)=\frac{\sqrt15-1}{\sqrt15}\\ 6)K=4-\frac{4}{\sqrt15}.\frac{\sqrt15}{\sqrt15-1}=4-\frac{4}{\sqrt15-1}\)
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