Question

Calculate: E=sin(a/2-2b), if
a in (0, pi/2)
sin a=4/5
b in (pi/2, pi)
ctg b=-1/2​

Answer 1

Step-by-step explanation:

Calculate: E=sin(a/2-2b), if

a in (0, pi/2)

sin a=4/5

b in (pi/2, pi)

ctg b=-1/2

Answer 2

Answer:

ye kaun si class ka hai itna to batao