Question

si : SENx + COSx = un medio . hallar : senx. cosx

Answer 1

${sen(x)}^{2} + {cos(x)}^{2} = 1$
lo q pudes hacer con la expresion es elevaral al cuadrado
${(senx + cosx)}^{2} = { (\frac{1}{2} )}^{2} \\ {senx}^{2} + {cosx}^{2} + 2senx \times cosx = \frac{1}{4} \\ 1 + 2senx \times cosx = \frac{1}{4} \\ 2senx \times cosx = \frac{ - 3}{4} \\ senx \times cosx = \frac{ - 3}{8}$