SOLUTION: An equivalent expression for {{{ cos(3x/2)*cos(x/2)+sin(3x/2)*sin(x/2) }}} is?

SOLUTION: An equivalent expression for {{{ cos(3x/2)cos(x/2)+sin(3x/2)sin(x/2) }}} is?

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Question 957241: An equivalent expression for is?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

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