NY,NY
  • NY,NY
Which trigonometric expression does not simplify to 1? (see link)
Mathematics
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NY,NY
  • NY,NY
Which trigonometric expression does not simplify to 1? (see link)
Mathematics
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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NY,NY
  • NY,NY
http://puu.sh/iumN8/7819dc2e72.png
Vocaloid
  • Vocaloid
well, let's try each answer one by one and see what we get, shall we?
NY,NY
  • NY,NY
ok.

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More answers

Vocaloid
  • Vocaloid
|dw:1434685599699:dw|
anonymous
  • anonymous
help me please my question is at the top of the feed
Vocaloid
  • Vocaloid
does that make sense?
NY,NY
  • NY,NY
I dont understand how cos^2/sin^2 became just cos^2.
Vocaloid
  • Vocaloid
I distributed sin^2(x)
Vocaloid
  • Vocaloid
|dw:1434685846593:dw|
Vocaloid
  • Vocaloid
see how sin^2(x) cancels out?
Vocaloid
  • Vocaloid
|dw:1434685945486:dw|
Vocaloid
  • Vocaloid
|dw:1434685962311:dw|
NY,NY
  • NY,NY
Oh yes that makes more sense.
NY,NY
  • NY,NY
Thank you for explaining that.
Vocaloid
  • Vocaloid
ok, so we know that #1 is not the right answer because we get 1 in the end
Vocaloid
  • Vocaloid
let's move on to number 2
NY,NY
  • NY,NY
Ok.
Vocaloid
  • Vocaloid
|dw:1434686053840:dw|
Vocaloid
  • Vocaloid
|dw:1434686204867:dw|
Vocaloid
  • Vocaloid
does this make sense so far?
NY,NY
  • NY,NY
yes, because you used the Pythagorean identity at the end, right?
Vocaloid
  • Vocaloid
yup! ok, we know that #2 is out, because we ended up with 1, so let's move on to #3
NY,NY
  • NY,NY
Right.
Vocaloid
  • Vocaloid
|dw:1434686335785:dw|
Vocaloid
  • Vocaloid
now, I believe #3 is the right answer, but let's check #4 just in case
Vocaloid
  • Vocaloid
|dw:1434686426089:dw|
Vocaloid
  • Vocaloid
|dw:1434686523673:dw|
Vocaloid
  • Vocaloid
whew, that took a while, but do you understand everything so far? :)
Vocaloid
  • Vocaloid
the important thing to remember, is that when you have csc, sec, cot, or tan, you can re-write them in terms of cos or sin, which usually helps you cross things out and simplify :)
NY,NY
  • NY,NY
Im a little confused with the second step you took.
Vocaloid
  • Vocaloid
which one? #3 or #4?
NY,NY
  • NY,NY
#4.
Vocaloid
  • Vocaloid
can you tell me exactly which part is confusing?
NY,NY
  • NY,NY
the step that the arrow is pointing to |dw:1434687552340:dw|
NY,NY
  • NY,NY
Im confused how that concluded from the previous step, where you substituted the reciprocals.
Vocaloid
  • Vocaloid
|dw:1434687726888:dw|
Vocaloid
  • Vocaloid
which leaves me with|dw:1434687748727:dw|
Vocaloid
  • Vocaloid
does it make it more clear? or is there something you're still unsure about?
NY,NY
  • NY,NY
Ok, yes that makes sense.
NY,NY
  • NY,NY
So that leaves us with choice 3.
Vocaloid
  • Vocaloid
yup ~
NY,NY
  • NY,NY
Ok, thank you for helping.

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