Answer:
Step-by-step explanation:
By interior angle property on one side of the transversal.

Answer:
circle= 5, triangle= 3
Step-by-step explanation:
Please see attached picture for full solution.
First bring them to common denominator.
Answers are like this: 1)Cos C 2)Cos B 3)Cos A 4)a 5)b 6)c all of them are different type of writing cosines law , just this.