Average Monthly Temperature in Phoenix The following function approximates average monthly temperature y (in °F) in Phoenix, Arizona. Here x represents the month, where x = 1 corresponds to January, x = 2 corresponds to February, and so on. ( Source: www.weather.com) f ( x ) = 19.5 cos [ π 6 ( x − 7 ) ] + 70.5 When is the average monthly temperature (a) 70.5°F (b) 55°F?
Average Monthly Temperature in Phoenix The following function approximates average monthly temperature y (in °F) in Phoenix, Arizona. Here x represents the month, where x = 1 corresponds to January, x = 2 corresponds to February, and so on. ( Source: www.weather.com) f ( x ) = 19.5 cos [ π 6 ( x − 7 ) ] + 70.5 When is the average monthly temperature (a) 70.5°F (b) 55°F?
Solution Summary: The author explains how to calculate the month when the average monthly temperature is 70.5°F.
Average Monthly Temperature in Phoenix The following function approximates average monthly temperature y (in °F) in Phoenix, Arizona. Here x represents the month, where x = 1 corresponds to January, x = 2 corresponds to February, and so on. (Source: www.weather.com)
f
(
x
)
=
19.5
cos
[
π
6
(
x
−
7
)
]
+
70.5
When is the average monthly temperature (a) 70.5°F (b) 55°F?
Expression, rule, or law that gives the relationship between an independent variable and dependent variable. Some important types of functions are injective function, surjective function, polynomial function, and inverse function.
Write the equation of the trigonometric
function shown in the graph.
LO
5
4
3
2
1
y
-5
-5
4
8
8
500
-1
-2
-3
-4
-5
x
5
15л
5л
25л
15л
35π
5л
4
8
2
8
4
8
2. If log2 (sin x) + log₂ (cos x) = -2 and log2 (sin x + cos x) = (-2 + log2 n), find n.
If cscx- cotx = -4, find cscx + cotx.
Chapter 6 Solutions
MyLab Math with Pearson eText -- 24-Month Standalone Access Card -- for Trigonometry
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