Question #5b380

1 Answer
dani83
Aug 16, 2015

# f(x) = 3 cos x -2 #

Domain: #{x in RR} #
Range: #{f(x) in RR: -5 <= f(x) <= 1} #

Explanation:

# f(x) = 3 cos x -2 #

Domain:
#x# can be any real number.

Range:
# -1 <= cos x <= 1 #
# -3 <= 3cos x <= 3 #
# -3-2 <= 3cos x-2 <= 3-2 #
# -5 <= f(x) <= 1 #

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