kobeni-chan
  • kobeni-chan
FAN and MEDAL! :) Prove: sin θ - sin θ•cos^2 θ = sin3 θ. You must show all work. I think I use the Pythagorean Identity with this one?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
I think you're right :)
anonymous
  • anonymous
But in case you need reassurance, try eliminating a common factor and see if the remaining terms look familiar
anonymous
  • anonymous
shouldn't it be sin^3 θ not Sin 3θ ??

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kobeni-chan
  • kobeni-chan
Oh sorry about that. I forgot to fix it so it read as an exponent >_< sin^3 θ
kobeni-chan
  • kobeni-chan
Should I divide by sin θ to make it all 1 - cos^2 θ = sin^2 θ? Ohh so it'll be sin^2 θ + cos^2 θ = 1 when i move the cos around.
kobeni-chan
  • kobeni-chan
Thanks guys :) Sorry I cant give out more than 1 medal.
anonymous
  • anonymous
haha it's alright

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