1. ## further triangle

want to check my answers to see if i have finally grasped sine and cosine.
triangle BCF..<f=60.6 side BC=4500 and BF=4778.7
thanks

2. Originally Posted by jim49990
want to check my answers to see if i have finally grasped sine and cosine.
triangle BCF..<f=60.6 side BC=4500 and BF=4778.7
thanks
is it a right triangle?

3. ## no its not

it sits side on to the previous triangle in the problem i posted cosine rule