Math, asked by karsh722305, 8 days ago

Please solve this :-
 {cos}^{2} 2x -  {cos}^{2} 6x   =  sin4x sin8x


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Answers

Answered by varunshahlgs
0

Answer:

LHS=cos22x−cos26x

=(cos2x−cos6x)(cos2x+cos6x)

=(−2sin(22x+6x)sin(22x−6x))(−2cos(22x+6x)cos(22x−6x))=(2sin4xcos4x)(2sin2xcos2x)=sin4xsin8x

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