SOLUTION: Find the exact value for cos2x given sinx = √2/2?
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Question 935570: Find the exact value for cos2x given sinx = √2/2?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Divide top and bottom by
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label the components:
Find the horizontal component
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and, also
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and
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Finally,
In both of these cases
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