karatechopper
  • karatechopper
Can someone please check a trig function worksheet for me? I'm practicing! :)
Mathematics
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karatechopper
  • karatechopper
Can someone please check a trig function worksheet for me? I'm practicing! :)
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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lfreeman1285
  • lfreeman1285
I might be able to help!
karatechopper
  • karatechopper
1 Attachment
Nnesha
  • Nnesha
https://www.mathsisfun.com/geometry/images/circle-unit-304560.gif :=)

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Loser66
  • Loser66
WWWWWWWWWWWWWooooooooooooooooah!! you memorize all of them??? A/MA/Zing
karatechopper
  • karatechopper
Didn't memorize! I use the hand method. :)
Loser66
  • Loser66
teach me, please
lfreeman1285
  • lfreeman1285
memorizing them isn't incredibly difficult, I had to for precalculus. These look correct! I didn't find any mistakes in my quick glance. I'll continue looking though.
karatechopper
  • karatechopper
So basically each finger on the hand has a different angle. Thumb-90 Index-60 Middle-45 Ring-30 Thumb-0 The palm is always 2. On top= cosine (side where the thumb points up) On bottom=sine (side where the pinky finger is) Say for example we are given the problem find Cos(pi/6) We know that pi/6 is a 30 degree angle, thus we put our ring finger down. We also can tell from the unit circle that when cos is pi/6, cos is positive. We put our ring finger down and then see that we have up on the cosine side above the folded finger. We have 3 fingers (ON TOP-COSINE) Now, anytime we look at the fingers, we need to square root them. So we say sqrt of 3, and then we put the value above the 2 in the palm bc this isn't Tangent or Cotangent where we have to look at both Sine and Cosine. Therefore, the answer for cos(pi/6) is sqrt3/2. Make sense? :)
karatechopper
  • karatechopper
Thank you free man! Yeah this is a precalc review for a calc quiz I'm taking tomorrow haha.
karatechopper
  • karatechopper
@Loser66 there's an explanation example for the hand method I use.
Loser66
  • Loser66
Thank you.
lfreeman1285
  • lfreeman1285
it looks like you're going to do well on that quiz then haha
karatechopper
  • karatechopper
I would hope so! Are they all correct? The quiz tomorrow is timed and I have a lot of other tests/discussions, and work in school tomorrow. I hope I'm not worn out by the time I get to this quiz! :) .
Nnesha
  • Nnesha
tan 120 is it -sqrt{3} or positive ?
lfreeman1285
  • lfreeman1285
It's negative, because its in the second quadrant.
Nnesha
  • Nnesha
http://prntscr.com/8at9tn looks like square root tan isn't positive in 2nd q
Nnesha
  • Nnesha
no i mean on the worksheet :) there is just sqrt{3}
lfreeman1285
  • lfreeman1285
Tangents are negative in the second and fourth. Cosines are negative in the second and third. Sines are negative in the third and fourth.
lfreeman1285
  • lfreeman1285
So just being careful about which quadrant everything is in should help. Drawing the circle at the top of the test is what helped me.
Nnesha
  • Nnesha
yes i know.
Nnesha
  • Nnesha
that question was for kara :D
karatechopper
  • karatechopper
Thanks!!!
karatechopper
  • karatechopper
Help a lot guys!
karatechopper
  • karatechopper
Have a good day/night everyone! :) x
Nnesha
  • Nnesha
csc =1/sin so\[\huge\rm csc(\frac{ 7\pi }{ 6 })=\frac{ 1 }{ \frac{ -1 }{ 2 } }\]
karatechopper
  • karatechopper
-2!
Nnesha
  • Nnesha
yes there is -1/2 on the wrkshet
karatechopper
  • karatechopper
Lol yeah I just saw that haha. Fixed, thank you! :) x
Nnesha
  • Nnesha
11) sec 180 is wrong there is no way you can get 1 for sec tan can be one
Nnesha
  • Nnesha
good job :) 3 mistakes i guess typoz :D tan 120 sec 180 csc (7pi/6) :=)

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