anonymous
  • anonymous
if tanø= -4/3 in quadrant II, what is cosø?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@hartnn
freckles
  • freckles
hi! we can draw a right triangle in quadrant 2 .
freckles
  • freckles
or if you want @hartnn I will step away

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hartnn
  • hartnn
no please, go ahead!
anonymous
  • anonymous
anyone that can help me is fine:)
freckles
  • freckles
|dw:1433661088760:dw|
freckles
  • freckles
this is what the triangle looks like with the given info
freckles
  • freckles
to find cos(theta) you need to know the adjacent side (this is given) and the hyp
anonymous
  • anonymous
adjacent is on the -3, right?
freckles
  • freckles
yes sir
anonymous
  • anonymous
so whats next
freckles
  • freckles
you need the find the hyp
freckles
  • freckles
|dw:1433661364938:dw| this length that I just drew in black
freckles
  • freckles
hint: think Pythagorean theorem
anonymous
  • anonymous
so 5
freckles
  • freckles
yep yep
freckles
  • freckles
and recall cos(theta)=adj/hyp
anonymous
  • anonymous
so what do i do with that equation?
freckles
  • freckles
plug in the values
freckles
  • freckles
adj=-3 you said hyp=5 you said
anonymous
  • anonymous
sp 3/5 is the answer? that simple???:D
anonymous
  • anonymous
so*
freckles
  • freckles
well -3/5
freckles
  • freckles
yes
anonymous
  • anonymous
oh right

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