If ,

find

where a,b,c are the sides opposite to angles A,B,C in triangle ABC.

please help me...

Printable View

- Nov 7th 2011, 04:47 AMearthboyratios and trig ratios
If ,

find

where a,b,c are the sides opposite to angles A,B,C in triangle ABC.

please help me... - Nov 7th 2011, 07:00 AMearbothRe: ratios and trig ratios
1. I assume that the a in cos(a) denotes the angle opposite the side a. To avoid some confusion I'll use to denote this angle. Consequently denote the angles opposite the sides b or c.

2. Use a triangle with the side lengthes

a = 7, b = 8, c = 9

3. Use the Cosine rule to determine the cosine values of the corresponding angles.

I've got:

- Nov 7th 2011, 09:45 AMearthboyRe: ratios and trig ratios
yes there's a little confusion with the question. i have edited it