Respuesta :
if you see your unit circle
our coordinates for 5pi/4 are ( - rad 2 / 2 , - rad 2 /2)
sec is 1/cos
do some algebra
1/ - rad2/2
once you solve your final answer is - rad2
our coordinates for 5pi/4 are ( - rad 2 / 2 , - rad 2 /2)
sec is 1/cos
do some algebra
1/ - rad2/2
once you solve your final answer is - rad2