anonymous
  • anonymous
can someone please help Pre calc please?? It's A, B, C, or D picture attached vvv xoxo
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
Use pythagorean theorem to get your third side, then use triangular trig ratios to get the trig functions... like sin(theta)=opp/hyp, cos(theta)=adj/hyp, etc...
anonymous
  • anonymous
There is a nice little short cut too... once you find sin, cos, and tan... csc, sec, and cot are the reciprocals.

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More answers

anonymous
  • anonymous
@EulerGroupie is it A then??? the first choice?
anonymous
  • anonymous
That is not what I got. What did you get for the missing side?
anonymous
  • anonymous
12/3sqrt41
anonymous
  • anonymous
eek!\[c ^{2}=a ^{2}+b ^{2}\]where c is the hypotenuse. You have c and a... solve for b\[b=\sqrt{c ^{2}-a ^{2}}\]
anonymous
  • anonymous
It comes out nice... not irrational. What do you get for the missing side now?
anonymous
  • anonymous
9?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
Now, all of those trig functions have angle A in them... so you are looking at the triangle from that corner. If that's the case, then 9 is your adjacent side, 12 is your opposite side, and 15 is the hypotenuse. So what is sin A=opp/hyp?
anonymous
  • anonymous
4/5
anonymous
  • anonymous
Yes! Now cos A=adj/hyp... which is?
anonymous
  • anonymous
3/4
anonymous
  • anonymous
sorry thats not it!!
anonymous
  • anonymous
Not what I got. adj=9, hyp=15...
anonymous
  • anonymous
3/5
anonymous
  • anonymous
Yes! tan?
anonymous
  • anonymous
what is the equation for tan?
anonymous
  • anonymous
opp/adj
anonymous
  • anonymous
4/3 :)
anonymous
  • anonymous
Yes!
anonymous
  • anonymous
thank you, I understand the rest now
anonymous
  • anonymous
Awesome! You're welcome.

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