anonymous
  • anonymous
trig identity
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
\[\huge \frac{ sinx-2sinx^3 }{ 2\cos^3x-cosx } = tanx \]
anonymous
  • anonymous
is this proving? or simplifying?
anonymous
  • anonymous
proving

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anonymous
  • anonymous
the left side is confusing me to the max
anonymous
  • anonymous
|dw:1353299892857:dw|
anonymous
  • anonymous
The first step I factored out sinx and cosx The second step I used the double angle formula for cos2x
anonymous
  • anonymous
o.O you made it look so easy, how are you so good at these ?
anonymous
  • anonymous
Its all practice, I suggest you don't ask other people and actually spend at least 5 or 10 minutes trying to figure it out. You get better as you do more
anonymous
  • anonymous
i do try them all out before asking but i ALWAYS get stuck :S

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