How do you find the exact values of cos (14pi/4)?
1 Answer
Sep 11, 2016
0
Explanation:
Firstly
(14pi)/4" simplifies to" (7pi)/2 and
cos((7pi)/2)=cos((7pi)/2-2pi)=cos((3pi)/2)
color(orange)"Reminder " color(red)(bar(ul(|color(white)(a/a)color(black)(cos((3pi)/2)=0)color(white)(a/a)|)))
rArrcos((14pi)/4)=cos((3pi)/2)=0
