(d^(20))/(dx^(20))(2cosxcos3x)is equal t...

`(d^(20))/(dx^(20))(2cosxcos3x)`is equal to (a)`2^(20)(cos2x-2^(20)cos3x)` (b)`2^(20)(cos2x+2^(20)cos4x)` (c)`2^(20)(sin2x+2^(20)sin4x)` (d)`2^(20)(sin2x-2^(20)sin4x)`

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(d^(20)y)/(dx^(20))(2cosxcos3x)i se q u a l to a)2^(20)(cos2x-2^(20)os3x) b)2^(20)(cos2x+2^(20)cos4x) c)2^(20)(sin2x+2^(20)sin4x) d)2^(20)(sin2x-2^(20)sin4x)

(d^(20)y)/(dx^(20))(2cosxcos3x)is equal to 2^(20)(cos2x-2^(20)os3x) 2^(20)(cos2x+2^(20)cos4x) 2^(20)(sin2x+2^(20)sin4x) 2^(20)(sin2x-2^(20)sin4x)

(d^(20))/(dx^(20))(2cosxcos3x)= 2^(20)(cos2x-2^(20)cos4x) (b) 2^(20)(cos2x+2^(20)cos4x) (c) 2^(20)(sin2x+2^(20)sin4x) (d) 2^(20)(sin2x-2^(20)sin4x)

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