Solving a Trigonometric Equation by Factoring, Example 2

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  1. patrickJMT
  2. math
  3. trigonometry
  4. solve
  5. equation
  6. factor
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Комментарии
Автор

@Killuminatismd a lot of times, it is a matter of just finding the correct identity to use and then recognizing how to factor from there... that is what makes these problems tricky to me.

patrickjmt
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@patrickJMT Thanks for the response Patrick. You don't know how much respect i have for you and khan academy. You guys are great, and are on a mission to educate the world! On behalf of everyone thats grateful, THANKS PATRICK!

Killuminatismd
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awesome patrick, thanks again for the video :) is there a particular way to go about solving these? or is it just trial and error with the identities, until you find the right one?

Killuminatismd
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It made sense... Holy crap it made Thank you so much...

RandomSequenceActiva
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Is it okay to divide out terms like that if you have, for instance, a sin squared on one side and a sin on the other, just as long as you aren't completely getting rid of something like at the beginning of this problem?

alreadytakentherd
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Kinda saved my life here lol, I was so confused with this stuff.

jetswhiteout
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Wait, I'm confused. How did 2sinxcosx - cosx = 0 become cosx(2sinx-1) = 0? I can't wrap my head around what happened. Why -1? Where did that come from? Also how is cosx= pi/2? Is that like, an identity? Also, why 3pi/2?

Shinbunshii