Curry
  • Curry
sin 3x= 3cos^2(x)sinx - sin^3(x) prove
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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amistre64
  • amistre64
well, first id wanna split that 3x into parts
amistre64
  • amistre64
sin(2x+x) then split the results again
amistre64
  • amistre64
sin(2x+x) = sin(2x)cos(x)+sin(x)cos(2x) = sin(x+x)cos(x)+sin(x)cos(x+x) etc

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amistre64
  • amistre64
with any luck it simplifies down to that
Curry
  • Curry
it doesnt simplify down to that
amistre64
  • amistre64
what did you end up with?
Curry
  • Curry
4sincos^2-sin
amistre64
  • amistre64
sin(x+x)cos(x)+sin(x)cos(x+x) 2sin(x)cos^2(x) + sin(x)cos^2(x)-sin^3(x) 3sin(x)cos^2(x) -sin^3(x)
amistre64
  • amistre64
you sure?
Curry
  • Curry
um
Curry
  • Curry
nvm u got it right i used ther wrong identity

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