Solution
Solution
+1
Solution steps
Simplify
Rewrite using trig identities
Use the following trivial identity
Simplify
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Frequently Asked Questions (FAQ)
What is the value of cos^2((9pi)/8)-cos(2*(9pi)/8) ?
The value of cos^2((9pi)/8)-cos(2*(9pi)/8) is (2-sqrt(2))/4