How do you evaluate the expression #csc(pi/4)#?
1 Answer
Aug 11, 2016
Explanation:
Using the
#color(blue)"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#