austinmw147 austinmw147
  • 23-06-2017
  • Mathematics
contestada

Rewrite with only sin x and cos x. sin 2x - cos 2x

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RickyChen
RickyChen RickyChen
  • 23-06-2017
sin2x = 2sinxcosx
cos2x = (cosx)^2 - (sinx)^2 = 2(cosx)^2 -1 = 1- 2(sinx)^2

Any combination you want is here.
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taylorj740
taylorj740 taylorj740
  • 23-06-2017
Sin2x-cos2x
2sinxcosx-2cos^2x-1
2cos^2x+2sinxcosx-1
I think that's how you do this one.
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