Express cos^2 x in terms of cos2x. Hence, express f(x) = 6cos^2 x - 4sin 2x in the form R cos (2x + Y degrees) + p where R, y an
d p are constants. Find the maxium and minimum values of f(x) and sketch its graph in the domain -180 <= x <= 360
1 answer:
2cos^2 x = 1 + cos 2x
cos^2 x = 1/2(1 + cos 2x)
f(x) = 6cos^2 x - 4 sin 2x = 6(1/2(1 + cos 2x) - 4 sin 2x = 3 + 3cos 2x - 4sin 2x
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Answer:
225 feet below sea level, 18 feet above sea level.
Step-by-step explanation:
Negative represents below, if the 0 is sea level, and positive represents above.
h(x)= -kx + 14
18 = -k*2 + 14 since x=2
18 = -2k +14
subtract 14 from each side
4 = -2k
divide by -2
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Answer Is In Image Provided.
Answer:
25%
Step-by-step explanation:
Total= 40 students
boys +girls= 40
30 +girls= 40
number of girls
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= 10
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