Trig Functions Reference Graphs Page 7
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7 .5B Homework from the book: (
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p. 285 #5, 9, 10, 11, 12, 17, 21
5) Express each of the following in terms of a reference angle
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a) tan(820º) = _______#
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b) sec(290º) = ________
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c) cot(185º) = ________#
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d) csc(4) = _________
9) Sketch a graph of cot ! versus ! for – π ≤ ! ≤ 3π. Be sure to show where any
vertical asymptotes occur.
10) On a single set of axes, graph y = sin (x) and y = csc (x), showing at least two full
periods of each function. Using the reciprocal relationship between sine and
cosecant, explain the features (x-intercepts, vertical asymptotes, periodicity, and so
on) of the cosecant graph.
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