Select the correct answer. What is the domain of the function represented by this graph? the graph of a quadratic function y = x
^2 – 4 with a minimum value at the point (0,-4)
A. x ≥ 4
B. x ≤ 0
C. all real numbers
D. -2 ≤ x ≤ 2
A. x ≥ 4
B. x ≤ 0
C. all real numbers
D. -2 ≤ x ≤ 2
2 answers:
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Answer:
<h3>-cos10°</h3>Step-by-step explanation:
cos is positive at first and fourth quadrant
so, cos (-x) = cos (x)
also, cos(180-x) = -cos x
cos (180+x) = -cos x
cos (-170°) = cos (170°)
cos(170°) = cos (180° - 10°)
= - cos 10°
