Question

Look at the figure.



What is the length of AB?

14 cm

23.32 cm

26 cm

28.49 cm

Answer 1

AP=10cot(30), PB=6

Answer 2

any ideas or work you have so far?

Answer 3

No clue

Answer 4

tan(30) = opp/adj

tan(30) = 10/AP

AP*tan(30) = 10

AP = 10/tan(30)

AP = 10/0.577350269

AP = 17.32050808

-------------------------

tan(45) = opp/adj

tan(45) = PB/6

6*tan(45) = PB

PB = 6*tan(45)

PB = 6*(1)

PB = 6


AB = AP + PB

AB = 17.32050808 + 6

AB = 23.32050808


So the approximate answer is 23.32

Answer 5

I really hate cosign, tan...etc They're so confusing!!!! Thank you so much

Answer 6

In this case, you can use the idea that a 45-45-90 triangle has 2 equal legs and a 30-60-90 triangle has one leg of 'x' and another leg of x*sqrt(3)

But in my opinion, it's best to get more practice and more used to cosine, sine, etc because you'll be seeing more of it later on (in trig class)

Answer 7

I know....:( It's so confusing my teacher taught it but she flew over the lesson so I really didn't get to understand it...

Answer 8

Yes it's definitely confusing for the first time. So go over anything and everything over and over until it starts to click.

Answer 9

Will do!!! Thanks so much

Answer 10

you're welcome