Question

can someone please help Pre calc please??
It's A, B, C, or D
picture attached vvv
xoxo

Answer 1

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...

Answer 2

There is a nice little short cut too... once you find sin, cos, and tan... csc, sec, and cot are the reciprocals.

Answer 3

@EulerGroupie is it A then??? the first choice?

Answer 4

That is not what I got. What did you get for the missing side?

Answer 5

12/3sqrt41

Answer 6

eek!\[c ^{2}=a ^{2}+b ^{2}\]where c is the hypotenuse.
You have c and a... solve for b\[b=\sqrt{c ^{2}-a ^{2}}\]

Answer 7

It comes out nice... not irrational. What do you get for the missing side now?

Answer 8

9?

Answer 9

Yes

Answer 10

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?

Answer 11

4/5

Answer 12

Yes! Now cos A=adj/hyp... which is?

Answer 13

3/4

Answer 14

sorry thats not it!!

Answer 15

Not what I got. adj=9, hyp=15...

Answer 16

3/5

Answer 17

Yes! tan?

Answer 18

what is the equation for tan?

Answer 19

opp/adj

Answer 20

4/3 :)

Answer 21

Yes!

Answer 22

thank you, I understand the rest now

Answer 23

Awesome! You're welcome.