SOLUTION: Prove : tanx + tanxcos2x=sin2x

Question 1189411: Prove : tanx + tanxcos2x=sin2x
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

manipulate left side
...........use Double-Angle Identities and identity
=
=..........simplify
=....................use Double-Angle Identities
=-> proven

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