BloomLocke367
  • BloomLocke367
http://prntscr.com/7bvgo4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
amilapsn
  • amilapsn
I can give you 5 mins dr
BloomLocke367
  • BloomLocke367
the question is there
Nnesha
  • Nnesha
remember CAST rule |dw:1433168945076:dw| so given value of cos is positive so it's either in first or 4th quadrant

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BloomLocke367
  • BloomLocke367
I'm confused
Nnesha
  • Nnesha
okay they gave you cos value you have to find an angle you r familiar with the unit circle that's same like simple x y graph x represent cosine y represent sin |dw:1433169243698:dw|
BloomLocke367
  • BloomLocke367
yes, I know the unit circle
Nnesha
  • Nnesha
|dw:1433169288228:dw| so it's either in first or 4th quadrant now what given angle belongs to 1st or 4th qudrant ?
BloomLocke367
  • BloomLocke367
ummm
Nnesha
  • Nnesha
hmm can u use unit circle ?
BloomLocke367
  • BloomLocke367
30 degrees and 45 degrees, right?
BloomLocke367
  • BloomLocke367
@Nnesha
Nnesha
  • Nnesha
yep right both angle are in first quadrant |dw:1433169687740:dw| left side 60=30-90 triangle and right side 45-45 90 triangle given is sqrt 2 over 2 so which one you suppose to use ?
Nnesha
  • Nnesha
cos is adjacent over hyp right ?
BloomLocke367
  • BloomLocke367
yes
Nnesha
  • Nnesha
so you have to use 45-45-90 trianlge or you can look at the unit circle |dw:1433170017138:dw| at what angle cos value is sqrt 2 over 2
Nnesha
  • Nnesha
http://prntscr.com/7bvp38
BloomLocke367
  • BloomLocke367
45 degrees
Nnesha
  • Nnesha
yep right
BloomLocke367
  • BloomLocke367
is that the inverse value?
Nnesha
  • Nnesha
yep given is value of soc you have to find at what angle cosine is sqrt2 over2 inverse ! :-)
BloomLocke367
  • BloomLocke367
oh, thanks!
Nnesha
  • Nnesha
np :-)

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