Question

Yet again find the requested function value meeting all of the given conditions cosO=-√2/2 and tanO<0 find cosO

Answer 1

find cosO or sinO ?

Answer 2

My mistake it wants to find cotO

Answer 3

from the given conditions, the angle in the 2nd quadrant, and by using the phythorian therom ==> 2+n^2=4===> n=sqrt(2) ===> cotO = cosO/sinO = [-sqrt(2)/2]/[sqrt(2)/2] = -1

Answer 4

so cotO=1?

Answer 5

-1

Answer 6

yes it's -1