Come valuti l'espressione csc (pi / 4) csc(π4)?
Risposta:
sqrt2√2
Spiegazione:
Using the color(blue)"trig. identity"trig. identity
color(orange)"Reminder " color(red)(|bar(ul(color(white)(a/a)color(black)(csctheta=1/sintheta)color(white)(a/a)|)))
rArrcsc(pi/4)=1/sin(pi/4)
color(orange)"Reminder " color(red)(|bar(ul(color(white)(a/a)color(black)(sin(pi/4)=1/sqrt2)color(white)(a/a)|)))
rArrcsc(pi/4)=1/sin(pi/4)=(1)/(1/sqrt2)=sqrt2