What is the sign of B + A?

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

Ineed with number 6 , explain how to get 1978

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?