Question

The figure below shows a bamboo structure. What is the length of NB? Show all the steps you used to find your answer.

Answer 1

1. Use Pythagoras for triangle ANC.. and Find NC..
2. Find angle, < CAN, using trigonometry..
3. Than look at triangle ABC, its a right angle triangle..
4. Find AB using trigonometry..
5. And NB = AB - AN..

Gotta ????

Answer 2

can you show me please

Answer 3

y dont u try and and i will pop in if u get stuck..

Answer 4

so 9^2 + 5^2= C^2

Answer 5

81+25= c2

Answer 6

right.. go ahead..

Answer 7

106=c2

Answer 8

sqrt106 = 10.295630140987

Answer 9

so NB= 10.29?

Answer 10

perfect..

Answer 11

now step 2..

Answer 12

whats step 2?

Answer 13

Cos A = adjescent / Hypotaneous

Answer 14

im not sure how to do that

Answer 15

so have u studied trigonometry ??

Answer 16

a little bit, im really bad at sin, cos, and tan

Answer 17

on my calculator i put 10.29 and pressed cos, i got 0.9839152298

Answer 18

hello?

Answer 19

oh sorry working parallel..
so Cos A = 5/9 = so < A =
take cos inverse fucntion.. not cos function..

Answer 20

im still confused

Answer 21

ok Cos A = 5/9
therefore Angle A = Cos inverse (5/9)
so it comes out 56.25 degrees..

Answer 22

im sorry but can you just write out part 2, i really have to go

Answer 23

u dont need to calculate.. Just write it as COS A = 5/9

Answer 24

Now, step 3 and step 4..
In Triangle ABC,

cos A = adjacent/ hyp = 9 / AB

SO from step 2, substitute the value 5/9 = 9/ AB

therefore, AB = 81/ 5 = 16.2..

Answer 25

step 5, SO from above 2 steps, NB = Ab- AN = 16.2 - 5 = 11.2

is the answer..

Answer 26

thank you so much!

Answer 27

sorry , for keeping u await and for confusion.. let me know, if any step unclear..

Answer 28

thats ok, sorry for rushing you lol. Thanks again