Question

@jeweaver6895



This is the last thing I need help with. I promise this is the last thing I need, scouts honor. Thanks a billion! :]

Answer 1

Its no problem, im happy to help :) ok this one your going to use your trig identities again. but lets begin with the angle, what do you know about the sum of the angles in a triangle?

Answer 2

They all equal to 180 degrees.

Answer 3

correct, so when one angle is 50 and one is 90, what does the third angle have to be?

Answer 4

40?

Answer 5

Right! ok now onto the sides! so lets work with angle A as we try to find the values of the sides of the triangle

Answer 6

For side AB we know that it is the hypotenuse, and we have a side adjacent to angle A, so which trig identity should we use?

Answer 7

Cos? adjacent/hypotenuse

Answer 8

Correct! so set that up for me, how do you use it?

Answer 9

cos 5/125
sorry if its wrong it honestly my best guess

Answer 10

dont be sorry if its wrong, failures are how we learn :) So we know that the cos(50)=125/AB because cos(x)=adj/hyp

Answer 11

Ohh okay I see how it done now makes sense. :] Also thanks sorry it's just I always feel like apologizing if I make a mistake.

Answer 12

Great so what did you get for AB? its alright :)

Answer 13

I got 66, is that right or wrong?

Answer 14

no thats not quite it :) so did you divide 125 by cos(50) to solve for AB?

Answer 15

ohhhhhhh okay give me a sec I see what I did wrong

Answer 16

194?

Answer 17

YEP! ok now the last one! how do you find CB?

Answer 18

I use the pythagorean theorem now?

Answer 19

you could use that, it might be a little easier to use tan

Answer 20

Well I got 231 using the theorem was it right or wrong?

Answer 21

no thats not right, CB has to be less than the hypotenuse, try the other method :)

Answer 22

I got 33 but it doesn't look right to me so I think I'm doing this wrong but I'm not exactly sure what could you point out what it is if you can tell?

Answer 23

no thats not quite it either, ok ill walk you through it :) so from trig we know that the tan(50) is the opposite/adjacent, so when we put in values we get tan(50)=CB/125

Answer 24

rearranging the equation a little bit we find that CB=125*tan(50)

Answer 25

Ohhhhhhhhhhh I was dividing the whole time and its actually multiplying so now I got
148.969 which rounds to 149.

Answer 26

ahh thatll get ya! you got it! Congratulations! :)

Answer 27

Thanks so much again!

Answer 28

Yeah you bethca!