How do you find the value of #cos 8(pi)# using the graph? Trigonometry Graphing Trigonometric Functions Translating Sine and Cosine Functions 1 Answer Somebody N. Apr 13, 2018 #color(blue)(1)# Explanation: #8pi# is 4 complete revolutions around the unit circle. If we start at #0# and cycle 4 times around the unit circle, we are back to where we started. i.e. #0#. #cos(8pi)=cos(0)=color(blue)(1)# Answer link Related questions How do you graph sine and cosine functions when it is translated? How do you graph #y=sin ( x -frac{\pi}{2} )#? How do you draw a sketch of #y = 1 + cos (x - pi)# How do you shift and graph #y=-3+sinx#? How do you graph #y=3sin(1/3x+ pi/2)-2#? How do you graph #1/2sin(x-pi)#? How do you graph #-sinx+2#? How do you graph #y=3sin(1/2)x#? How do you graph #y=-2cos((pix)/3)#? How do you graph #y = (1/2)sin(x - pi)#? See all questions in Translating Sine and Cosine Functions Impact of this question 2975 views around the world You can reuse this answer Creative Commons License