Find cos (s+t) given that cos s=1/3, with s in quadrant 1, and sin t=-1/2, with t in quadrant 3

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

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step-by-step explanation:

the answer is: -22 also a

hope i

-lavira: )