Please prove the following trigonometric identity. Do not send any links please.
Q. sin 4 A - cos 2 A = sin 2 A - cos   A

Hi, 
The correct question must be:
cos4A - cos2A = sin4A - sin2A


 

 

‚Äč
 

  • 0
sorry i don't know the answer
  • -1
What are you looking for?