7
7
of f(x) =
+8, what is f(x) when x = 10?
9
13
36
4

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

it is a horizontal line.

the graph line crosses the x axis at both -6 and -2, so the answer would be the second one.