Exercise #3: Find the lengths of segments AB, CD, and EF shown below. Round your answers to the nearest eighth of an inch. Reduce if possible.
D
F
B
Three or more points are said to be collinear if they fall on the same straight line. In Exercise #2, we saw
three collinear points.

3100

step-by-step explanation:

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92