Question

In a laboratory experiment, an ultrasound detector located at D is used to measure the distances of two moving objects, P and Q. At a certain moment, P and Q are located as shown in the diagram. What is distance PQ?

Answer 1

@cwrw238

Answer 2

@dan815

Answer 3

@Kainui

Answer 4

use the cosine rule :)

Answer 5

http://prntscr.com/63rebj

Answer 6

Since they give you an angle and two sides and you want to find the THIRD side, you have to use the cosine rule :)

Answer 7

The screenshot isnt coming up though @butterflydreamer

Answer 8

http://prntscr.com/63rebj
really? :O

Answer 9

Really really lol @butterflydreamer

Answer 10

damnn.. well basically i just sent you what the cosine rule is..
Do you know the cosine rule?

Answer 11

Yeah thats all I need to solve it?

Answer 12

oh u know all the angles

Answer 13

use the fact the side are equal

Answer 14

pretty much :)