anonymous
  • anonymous
Simplify the expression: cot x sin x - sin quantity pi divided by two minus x. + cos x
Mathematics
chestercat
  • chestercat
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ali2x2
  • ali2x2
why dont you use wolfram or tiger-algebra
ali2x2
  • ali2x2
so easy too :P im not telling you you have to just a choice of action
anonymous
  • anonymous
I could, but this helps teach me more.

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anonymous
  • anonymous
really need the equation tool for this almost impossible to read in english
anonymous
  • anonymous
cot(x)sin(x)−sin((π2)−x)+cos(x)
ali2x2
  • ali2x2
ok
ali2x2
  • ali2x2
amazing how a mod agreed with me :3
ParthKohli
  • ParthKohli
cot eks sin eks equals cos eks divided by sin eks times sin eks equals cos eks sin quantity pi divided by two minus eks equals cos eks so the expression boils down to cos eks minus cos eks plus cos eks
anonymous
  • anonymous
Oh, and the answer choices are: cos(x) sin(x) 2sin(x) 2cos(x)
ali2x2
  • ali2x2
sin(x) + 2 cos(x)
ali2x2
  • ali2x2
https://www.wolframalpha.com/input/?i=cot%28x%29sin%28x%29%E2%88%92sin%28%28%CF%802%29%E2%88%92x%29%2Bcos%28x%29
anonymous
  • anonymous
Yeah, @ParthKohli I got that part, but I can't figure out how to get one of the answer choices from it.
anonymous
  • anonymous
Or at all, really....
anonymous
  • anonymous
@ali2x2 That's not one of the possible answers.
anonymous
  • anonymous
first off \[\sin(\frac{\pi}{2}-x)=\cos(x)\]
ali2x2
  • ali2x2
sorry that i couldnt help mabey @satellite73 will have better luck, MUCH BETTER LUCK
ali2x2
  • ali2x2
maybe
anonymous
  • anonymous
@satellite73 That's an identity?
anonymous
  • anonymous
anonymous
  • anonymous
Oh, whoops, @ParthKohli you solved it but it was confusing to look at, the final answer is cos(x).

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