anonymous
  • anonymous
Can someone explain this problem to me? tan(-20°) = -tan20° True- The answer is true, but I dont know why. False
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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harsimran_hs4
  • harsimran_hs4
ok let`s try can you tell sin(-x) = ? (in terms of sin(x))
anonymous
  • anonymous
umm Im not sure
harsimran_hs4
  • harsimran_hs4
anyways try...tell whatever is in your mind

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anonymous
  • anonymous
sin(180 -) = sin
harsimran_hs4
  • harsimran_hs4
ok so sin(-x) = - sin(x) (clear ?)
anonymous
  • anonymous
okay
harsimran_hs4
  • harsimran_hs4
now try for cos(-x) = ?
anonymous
  • anonymous
okay cos(-x)=-cos(x)
harsimran_hs4
  • harsimran_hs4
NO!!
anonymous
  • anonymous
cos(-x)=cos(x)
harsimran_hs4
  • harsimran_hs4
so now on right track so tan(-x) = sin(-x)/ cos(-x) = -sin(x)/ cos(x) = - tan(x) do you get it now?
anonymous
  • anonymous
yes, I believe so
harsimran_hs4
  • harsimran_hs4
why are you still not sure what`s the confusion?
anonymous
  • anonymous
Im saying I believe so, because Im new to this so im not going to know this, but I believe I know enough to get through this lesson
harsimran_hs4
  • harsimran_hs4
ok so does that end this question or there is still something that you need to ask?
anonymous
  • anonymous
No Im good, Thank you for your time!
harsimran_hs4
  • harsimran_hs4
:)

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