This conjecture is false, A and C don't have to be complementary angles.
Let Angle A be 100 and Angle B be 80 degrees. They are supplementary (sum of 180).
Let Angle C be 100 and Angle B is still 80 degrees. They are supplementary.
However, Angle A and Angle C are not complementary (sum of 90).
17/8 -11/3
51/24-88/24
-37/24 simplified is -1 13/24
Answer:
-1
Step-by-step explanation:
To solve for cos use
adjacent over hypotenuse
divide the lengths of the sides
adj. / hyp.
