The Cosine Rule

In triangle $L M N$ , the side $LM\,$ is 7 cm and the side $LN\,$ is 10 cm. The angle $MLN\,$ is $55∘55^\circ$ .

Work out the length of the side $M N$ .
Give your answer to 1 decimal place.

[3]

In triangle $L M N$ , the side $LM\,$ is 7 cm and the side $LN\,$ is 10 cm. The angle $MLN\,$ is $55∘55^\circ$ .

Work out the length of the side $M N$ .
Give your answer to 1 decimal place.

[3]

The Cosine Rule Questions