Question

solve the triangle a=13,b=7,c=15

Answer 1

Define 'solve'

Answer 2

Yea, what do you need to do?

Answer 3

i think they want the angles on the inside

Answer 4

Cosine rule.

Answer 5

how do i use it if theres no given angle

Answer 6

You use the cosine rule to find the angle...

Answer 7

ohh ok i see it my bad lol

Answer 8

Note the largest angle will be opposite the longest side.

Answer 9

Law of cosines..15^2=(7^2)+(13^2)-(2*7*13cos(a))....solve for a and that gives you the angle corresponding the the side 15. Then you can either do that for the other side as well of use the law of sines to find the another angle. Once you find a second angle. you can use the fact that the interior angles in a triangle sum to 180 degrees to find the third.

Answer 10

Hey linalg, are you good with linear algebra, guessin by your username?

Answer 11

thanks guys youve help me out big time!! :)

Answer 12

meganchiu..I'm ok with linear. That's the name I created when I first made an account because I had a question involving linear algebra; I was taking that class then..rocc0, you're welcome.