on.com ect | McGraw... Top Hat Mail Sheets Google Use a calculator to approximate cos (-1.2804). cos (-1.2804) $$\approx$$ (Round to four decimal places as needed.)
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In Exercises $51-68,$ use a calculator to evaluate the trigonometric expression. Round your answer to four decimal places. $$ \cos (-1.7) $$
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In Exercises $51-68,$ use a calculator to evaluate the trigonometric expression. Round your answer to four decimal places. $$ \cos (-2.5) $$
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