Solution
Solution
+1
Solution steps
Rewrite using trig identities:
Use the following trivial identity:
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Frequently Asked Questions (FAQ)
What is the value of cos((7pi)/(12))cos((5pi)/(12))+sin((7pi)/(12))sin((5pi)/(12)) ?
The value of cos((7pi)/(12))cos((5pi)/(12))+sin((7pi)/(12))sin((5pi)/(12)) is (sqrt(3))/2