easy trig help..easy 10- pts?

Question

a) a triangle ABC is an acute triangle. show that the area A of traingle ABC can will found using the formula A=.5acsinB

b) show that the area A of traingle ABC can be found using the formula A=0.5absinC

Answer 1

The area of any triangle is 1/2 B A where B is the base and A the altitude. In your acute triangle, a is the base and c sin ABC is the altitude.