a1234
  • a1234
Use the info given to evaluate the cosecant trig function, if possible. cos(pi/2 - x) = 3/5, cos x = 4/5 Is this 5/3? I don't get the question completely.
Mathematics
katieb
  • katieb
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a1234
  • a1234
anonymous
  • anonymous
\(cos (\pi/2 - x) = sin x\) → that's a co-function identity so they want the cosecant of the angle whose sine is 3/5 and cosine is 4/5
anonymous
  • anonymous
so yeah, that's 5/3

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a1234
  • a1234
Oh, ok. I forgot the co-function identity part. I just drew a triangle with the cos = 4/5 part.
anonymous
  • anonymous
that's usually how I do it. and then just use the second given trig function to make sure the sign is correct
a1234
  • a1234
Yes. Thanks!

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