Question 1 Report
In △ △ XYZ, determine the cosine of angle Z.
Answer Details
cos z = y2+x2−z22yx y 2 + x 2 − z 2 2 y x
= 9+36−162(3)(6) 9 + 36 − 16 2 ( 3 ) ( 6 )
= 2936
