Question

Sin (50+A)-cos(40-A)=

Thanks

Answer 1

sin(50+A) -cos(40-A)
sin(50+A)-cos(90-40+A)
sin(50+A)-sin(50+A)
0

Answer 2

Answer:

Sin(50+A)-cos(40-A)

Sin(50+A)-Cos(90-50-A)

Sin(50+A)-Sin(50-A) ; cos(90-A)=SinA

0= ans