Problem 96 of 7
Identify domain and range of basic trig function y = cos(x).
Hints
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use graphs and reciprocal restrictions.
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Use graphs and reciprocal restrictions for all six functions.
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Solution
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1. Identify zeros of denominator for reciprocal or ratio functions.
2. Use graph behavior to determine range.
3. State domain exclusions and output interval.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Saying reciprocal trig functions have range [-1,1].