[IME 2012] O valor de y=sen70∘cos50∘+sen260∘co...

09 IME 2012 - Matemática

O valor de $y = sen 7 0^{\circ} cos 5 0^{\circ} + sen 26 0^{\circ} cos 28 0^{\circ}$ é:

3

\frac{3}{2}

\frac{3}{3}

\frac{3}{4}

\frac{3}{5}