SOLUTION: Express cos 71pi/11 as a function of a real number a where 0 < a < pi/2.
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Question 779175: Express cos 71pi/11 as a function of a real number a where 0 < a < pi/2.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
You can subtract any multiples of without
changing the expression
Subtract
This is less than since
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This is the cosine of an angle in radians
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