evaluate the following in exact form, where the angeles alpha and beta satisfy the conditions:
sin alpha=4/5 for pi/2 < alpha < pi
tan beta=7/24 for pie < beta < 3pi/2
answer choices
A. sin(beta+alpha) B. tan(beta-alpha) C. cos(alpha-beta)
sin alpha=4/5 for pi/2 < alpha < pi
tan beta=7/24 for pie < beta < 3pi/2
answer choices
A. sin(beta+alpha) B. tan(beta-alpha) C. cos(alpha-beta)