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Which ordered pairs are solutions to the equation 2.c + 1ly = 9?
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0 (-1,-6)
0 (-2,4)
3
(-4,-9)
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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

step-by-step explanation:

graph using a few selected

x         y

-1       15

0         6

1         2.4

2       0.96

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .