SOLUTION: I have to simplify an expression using a double angle formula. the expression is 2cos^2(41)-1 would the simplification be cos(82)?

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Question 761119: I have to simplify an expression using a double angle formula. the expression is
2cos^2(41)-1 would the simplification be cos(82)?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
I have to simplify an expression using a double angle formula. the expression is
2cos^2(41)-1 would the simplification be cos(82)?
**
Identity:cos%282x%29=2cos%5E2%28x%29-1
2cos%5E2%2841%29-1=2%2A41=82
so, you got the correct answer